To compliment our fuel tube system we have developed this dual entry fuel rail system. When using 2 x 044 pumps with the factory fuel rail and pressure regulator, we have found that the factory fuel pressure regulator can not keep the rail pressure low enough at light load and cruise speeds. The answer to this problem, is the new Process West dual entry fuel rail with Turbosmart FPR 1200 regulator.

Process West's Unique FG Billet Fuel Rail mounting system, allows the use of standard height injectors, as well as aftermarket longer injectors. The fuel rail is available on its own for those customers who wish to plumb up all the fuel line themselves, or can be purchased along with a complete fitting kit.

To compliment our fuel tube system we have developed this dual entry fuel rail system. When using 2 x 044 pumps with the factory fuel rail and pressure regulator, we have found that the factory fuel pressure regulator can not keep the rail pressure low enough at light load and cruise speeds. The answer to this problem, is the new Process West dual entry fuel rail with Turbosmart FPR 1200 regulator.

Process West's Unique FG Billet Fuel Rail mounting system, allows the use of standard height injectors, as well as aftermarket longer injectors. The fuel rail is available on its own for those customers who wish to plumb up all the fuel line themselves, or can be purchased along with a complete fitting kit.

This bolt-on, integrated performance upgrade simultaneously solves the two most significant bottlenecks in the EJ-series intake system: air restriction and fuel supply.

This Dual Fuel Rail Tumbler Delete Kit, CNC machined from billet aluminium, replaces the restrictive factory assembly with precision-machined billet components, providing maximum airflow and guaranteed fuel delivery for high-boost applications.

Billet Tumbler Delete 

The factory Tumble Generator Valves (TGV, often referred to as tumblers) use butterfly valves in the intake runners that create severe restriction, especially at mid to high RPMs.

Our Billet Tumbler Delete Kit eliminates this bottleneck entirely.

Unrestricted Performance

CNC machined from Billet Aluminum to create a high-flow, smooth internal runner.

Significant Power Gains

By smoothing the path of air into the cylinder heads, you remove a major choke point, resulting in measurable increases in horsepower and torque across the entire rev range.

Precision Design

Features a smooth, radiused inlet and outlet profile, ensuring maximum laminar flow into the cylinder head ports.

Dual Fuel Rails

For serious power builders utilising upgraded turbos, injectors, and E85 or race fuels, the factory single-feed fuel system is inadequate. Our integrated Dual Fuel Rails solve fueling inconsistencies under high load:

Consistent Fuel Pressure

The dual-rail design supports larger injectors and provides a reliable, uninterrupted flow of fuel, preventing fuel starvation issues common in highly tuned applications.

High-Volume Ready

Essential for high-horsepower builds, ensuring your engine receives the precise volume of fuel required when running increased boost or alternative fuels (E85).

Integrated Design

Seamlessly engineered into the TGV Delete assembly, reducing complexity and potential failure points compared to separate rail and spacer kits.

Vehicle Compatibility
Subaru WRX & STI (EJ20/EJ25) 2001–2007 (GD Chassis)
Subaru STI (EJ25) 2008–2021 (GR/GV/VA Chassis)

The Process West Engine Pulley Garnish is a simple, high-quality replacement for the factory cover, adding a clean and purposeful finish to the engine bay.

Available in wrinkle coat red or black, it is a straightforward visual upgrade that makes a noticeable difference under the bonnet. All fixing hardware is included for a hassle-free installation.

A small detail that completes the engine bay presentation.

If you have purchased the primary fuel system (PWFGFPS) and want to add an additional pump or two you need the additional pump kit. Kit comes complete with wiring and is an easy fit.

The wiring harness comes pre-made with pins that simply plug into the primary wiring harness supplied with the primary fuel system.

This image shows the second pump installed.

This image shows the third pump installed.

Fitment Kit: Verticooler & Intake Manifold – Subaru WRX 2015–2021 (VA)
The Process West Fitting Kit is a dedicated hardware solution designed specifically for owners installing both the Process West Verticooler and the Process West Intake Manifold on a 2015–2021 Subaru WRX.

While both components are designed for high performance, their increased dimensions compared to factory parts create clearance constraints when used together. This kit provides the necessary components to ensure a seamless and professional integration of both systems.

Why and when this kit is required.
When upgrading to a high-volume induction system, space within the VA WRX engine bay becomes limited. This kit addresses two specific fitment variables:

• Manifold Height: The Process West Intake Manifold (PWIM007) features a taller plenum than the original unit, which reduces the available clearance for under-hood ducting.
• Ducting Alignment: The Verticooler (PWTMIC14B) includes an upgraded hood scoop and duct assembly to maximise airflow. Because the intake manifold sits higher, the standard Verticooler ducting is unable to fit correctly when used together.

If you are running the Process West Verticooler and plan to upgrade to the Process West Intake Manifold (or vice versa), this fitting kit is an essential addition to ensure both components work in physical harmony.

Front Mount Intercooler Kit — Ford Ranger PX1/PX2 & Mazda BT50 3.2
The Process West Front Mount Intercooler is built for Ranger and BT50 owners who demand real-world performance and long-term durability. Engineered to OEM-level fitment standards and validated through rigorous real-world testing, this is a serious upgrade for serious use.

Bar and plate core.
The 700 x 247 x 75mm bar and plate core delivers a significant increase in cooling surface area and overall thickness over the factory unit. Bar and plate construction is chosen for its superior heat dissipation, durability, and impact resistance — the toughest intercooler type available.

Proven real-world results.
Process West engineers tested the intercooler against the factory intercooler under identical real-world conditions — a loaded Ranger carrying 650kg up a 4km, 310m elevation climb at 80km/h. The factory intercooler peaked at 49°C. The Terra-Tuff peaked at just 28°C. That's a 43% improvement in cooling efficiency, translating to real gains in power, torque, and engine longevity through reduced EGT figures.

Piping built to last.
Four-ply moulded silicone hoses, high-durability constant tension hose clamps, and mandrel bent aluminium pipework combine for factory-level integrity across the entire system.

Isometric rubber mounts.
The intercooler core is mounted on isometric rubber mounts, allowing it to flex with the vehicle under demanding off-road conditions. This reduces strain on mounting brackets and hose connections for a longer service life.

The definitive intercooler upgrade for your Ranger or BT50 build.

Designed not only with market leading performance in mind, OEM level durability is also part of the Terra-Tuff arsenal, offering manufacturer style design and fitment, followed through with industry leading testing and validation.

Notably this intercooler kit will fit all models of Holden Colorado from 2013 onwards including the DPF models.

This means that when you fit a Process West Intercooler system to your Holden Colorado you have made a choice to have not only the best charge air cooling, resulting in significant power and torque gains, but you have also chosen a product that will last the life of your vehicle no matter what you throw at it.

HOLDEN COLORADO Process West Design Philosophy and Parts

Heart of the Process West Terra-Tuff Intercooler system is a durable front mounted Bar and Plate intercooler core. All Terra-Tuff intercoolers use Bar and Plate construction due to not only its effective cooling and heat-sink capability, but also because it is the most durable and impact resistant of all intercooler types. This is a huge replacement intercooler core measuring 673 x 200 x 80mm giving a massive increase in cooling surface area as well as overall thickness when compared to original.

Silicon Piping Options

The Holden Colorado Terra-Tuff intercooler kits comes with the intercooler core and a pair of replacement front silicone intercooler hoses, which is all of the parts that sit behind the grille of the vehicles.

This means that fitment is incredibly simple requiring only the grille to be removed and the intercooler and piping bolted straight in. For those that want to replace all of the factory hoses with Process West Terra-Tuff parts then we have two different options to suit both DPF and non-DPF models.

The reason we do this is that each of these models is different in the piping layout. Available at a small additional charge these optional silicon piping kits can be ordered here

All of our Process West Terra-Tuff piping consists of specifically moulded silicone hoses of four ply construction combined with high-durability constant tension hose-clamps.

The Process West Front Mount Intercooler is engineered for Isuzu D-MAX owners who demand both performance and long-term durability. Built to OEM-level fitment standards and validated through industry-leading testing, this is a genuine fit-and-forget upgrade.

Compatible with all D-MAX models from 2013 onwards, including DPF variants.

Bar and plate core.
At the heart of the system is a 673 x 200 x 80mm bar and plate intercooler core — significantly larger than the factory unit in both cooling surface area and overall thickness. Bar and plate construction is chosen specifically for its superior heat dissipation and impact resistance, making it the most durable intercooler type available.

Simple installation.
The kit includes the intercooler core and a pair of replacement front silicone hoses — everything that sits behind the grille. Installation requires only grille removal, with the intercooler and piping bolting straight in.

Full silicone piping options.
For those looking to replace all factory hoses, optional Process West silicone piping kits are available for both DPF and non-DPF models. All piping features four-ply moulded silicone construction paired with high-durability constant tension hose clamps.

A performance and durability upgrade built to last the life of your vehicle.

2001-2002 Subaru WRX/STI Front Mount Intercooler Kit

The Process West Front Mount Intercooler Kit for the 01-02 Subaru WRX/STI includes a 685 x 285 x 100mm bar & plate intercooler core, with hi-flow polished aluminium end tanks. This allows for smooth flow and effective cooling of the charge air entering the engine. Along with mandrel bent aluminium piping this Front Mount Intercooler Kit offers one of the best off-the-shelf options for the 01-02 Subaru WRX/STI on the market.

Front Mount Intercooler Kit — 2003–05 Subaru WRX/STI

The Process West Front Mount Intercooler Kit is one of the best off-the-shelf cooling upgrades available for the 2003–05 Subaru WRX/STI.

Core specifications. The 685 x 285 x 100mm bar and plate intercooler core features high-flow polished aluminium end tanks, ensuring smooth airflow and effective charge air cooling into the engine.

Complete kit. Mandrel bent aluminium piping is included, making this a comprehensive, ready-to-install solution with no additional components required.

A straightforward upgrade for serious WRX/STI performance.

2006-2007 Subaru WRX/STI Front Mount Intercooler Kit

The Process West Front Mount Intercooler Kit is one of the best off-the-shelf cooling upgrades available for the 2006–07 Subaru WRX/STI.

Core specifications. The 685 x 285 x 100mm bar and plate intercooler core features high-flow polished aluminium end tanks, ensuring smooth airflow and effective charge air cooling into the engine.

Complete kit. Mandrel bent aluminium piping is included, making this a comprehensive, ready-to-install solution with no additional components required.

A straightforward upgrade for serious WRX/STI performance.

The Process West Front Mount Intercooler Kit is the benchmark cooling upgrade for the 2008–14 Subaru STI. Engineered to extract the full potential of the platform, it delivers consistent, reliable performance that the factory intercooler simply cannot match under real-world driving conditions.

Why the factory intercooler falls short.

The stock GRB STI intercooler is adequate for standard output, but push the car harder — through a mountain run, on track, or with any meaningful tune, and heat soak becomes a real problem. Rising intake air temperatures rob the engine of power, reduce throttle response, and force the ECU to pull timing to protect itself. The result is inconsistent, diminishing performance exactly when you need it most.

Superior cooling, consistently.

The 620 x 255 x 90mm bar and plate core features high-flow aluminium end tanks, delivering a substantial increase in cooling surface area over the factory unit.

Lower intake air temperatures mean more oxygen-dense air entering the engine, translating to more consistent power across the rev range, sharper throttle response, and a safer, more effective tune.

Whether you are pushing hard on a back road or completing lap after lap on circuit, the Process West kit keeps intake temperatures in check where the factory unit cannot.

Mandrel bent aluminium piping.

The kit uses mandrel bent aluminium intercooler piping throughout, ensuring smooth, unrestricted airflow between the intercooler and engine. Mandrel bending maintains consistent pipe diameter through every bend, eliminating the flow restrictions that crush-bent piping creates.

One of the best off-the-shelf front mount intercooler options available for the 2008–14 Subaru STI.

The Process West Front Mount Intercooler Kit is the benchmark cooling upgrade for the 2008–14 Subaru GRB WRX. Engineered to extract the full potential of the platform, it delivers consistent, reliable performance that the factory intercooler simply cannot match under real-world driving conditions.

Why the factory intercooler falls short.

The stock GRB WRX intercooler is adequate for standard output, but push the car harder through a mountain run, on track, or with any meaningful tune, and heat soak becomes a real problem. Rising intake air temperatures rob the engine of power, reduce throttle response, and force the ECU to pull timing to protect itself. The result is inconsistent, diminishing performance exactly when you need it most.

Superior cooling, consistently.

The 620 x 255 x 90mm bar and plate core features high-flow polished aluminium end tanks, delivering a substantial increase in cooling surface area over the factory unit. Lower intake air temperatures mean more oxygen-dense air entering the engine, translating to more consistent power across the rev range, sharper throttle response, and a safer, more effective tune. Whether you are pushing hard on a back road or completing lap after lap on circuit, the Process West kit keeps intake temperatures in check where the factory unit cannot.

Mandrel bent aluminium piping.

The kit uses mandrel bent aluminium intercooler piping throughout, ensuring smooth, unrestricted airflow between the intercooler and engine. Mandrel bending maintains consistent pipe diameter through every bend, eliminating the flow restrictions that crush-bent piping creates.

One of the best off-the-shelf front mount intercooler options available for the 2008–14 Subaru GRB WRX.

Front Mount Intercooler Kit — Subaru VA STI 2015–21

The Process West Front Mount Intercooler Kit is the definitive cooling upgrade for the 2015–21 Subaru VA STI. Engineered to extract the full potential of the platform, it delivers the kind of consistent, reliable performance that the factory intercooler simply cannot match under real-world driving conditions.

Why the factory intercooler falls short.

The stock VA STI intercooler is adequate for standard output, but push the car harder — through a mountain run, on track, or with any meaningful tune — and heat soak becomes a real problem. Rising intake air temperatures rob the engine of power, reduce throttle response, and force the ECU to pull timing to protect itself. The result is inconsistent, diminishing performance exactly when you need it most.

Superior cooling, consistently.

The 685 x 275 x 85mm bar and plate core delivers a substantial increase in cooling surface area over the factory unit. Lower intake air temperatures mean more oxygen-dense air entering the engine, translating to more consistent power across the rev range, sharper throttle response, and a safer, more effective tune. Whether you are pushing hard on a back road or completing lap after lap on circuit, the Process West kit keeps intake temperatures in check where the factory unit cannot.

Lightweight CNC mandrel bent aluminium piping.

The kit uses CNC mandrel bent aluminium intercooler piping throughout, ensuring smooth, unrestricted airflow between the intercooler and engine. Mandrel bending maintains consistent pipe diameter through every bend, eliminating the flow restrictions that crush-bent piping creates.

True bolt-on fitment.

No cutting or permanent modification is required. All brackets, hose clamps, and necessary hardware are included for a clean, straightforward installation.

The foundation of any serious VA STI build.

The Process West Front Mount Intercooler Kit is the definitive cooling upgrade for the 2015–21 Subaru VA WRX. Engineered to extract the full potential of the platform, it delivers consistent, reliable performance that the factory intercooler simply cannot match under real-world driving conditions.

Why the factory intercooler falls short.

The stock VA WRX intercooler is adequate for standard output, but push the car harder — through a mountain run, on track, or with any meaningful tune — and heat soak becomes a real problem. Rising intake air temperatures rob the engine of power, reduce throttle response, and force the ECU to pull timing to protect itself. The result is inconsistent, diminishing performance exactly when you need it most.

Superior cooling, consistently.

The 685 x 275 x 85mm bar and plate core delivers a substantial increase in cooling surface area over the factory unit. Lower intake air temperatures mean more oxygen-dense air entering the engine, translating to more consistent power across the rev range, sharper throttle response, and a safer, more effective tune. Whether you are pushing hard on a back road or completing lap after lap on circuit, the Process West kit keeps intake temperatures in check where the factory unit cannot.

Lightweight CNC mandrel bent aluminium piping.

The kit uses CNC mandrel bent aluminium intercooler piping throughout, ensuring smooth, unrestricted airflow between the intercooler and engine. Mandrel bending maintains consistent pipe diameter through every bend, eliminating the flow restrictions that crush-bent piping creates.

True bolt-on fitment.

No cutting or permanent modification is required. All brackets, hose clamps, and necessary hardware are included for a clean, straightforward installation.

The foundation of any serious VA WRX build.

The Process West Front Mount Intercooler Kit is the benchmark cooling upgrade for the 1997–00 Subaru GC8 WRX and STI. Engineered to extract the full potential of the platform, it delivers consistent, reliable performance that the factory intercooler simply cannot match under real-world driving conditions.

Why the factory intercooler falls short.

The stock GC8 intercooler is adequate for standard output, but push the car harder through a mountain run, on track, or with any meaningful tune, and heat soak becomes a real problem. Rising intake air temperatures rob the engine of power, reduce throttle response, and force the ECU to pull timing to protect itself. The result is inconsistent, diminishing performance exactly when you need it most.

Superior cooling, consistently.

The 600 x 285 x 100mm bar and plate core features high-flow polished aluminium end tanks, delivering a substantial increase in cooling surface area over the factory unit. Lower intake air temperatures mean more oxygen-dense air entering the engine, translating to more consistent power across the rev range, sharper throttle response, and a safer, more effective tune. Whether you are pushing hard on a back road or completing lap after lap on circuit, the Process West kit keeps intake temperatures in check where the factory unit cannot.

Mandrel bent aluminium piping.

The kit uses mandrel bent aluminium intercooler piping throughout, ensuring smooth, unrestricted airflow between the intercooler and engine. Mandrel bending maintains consistent pipe diameter through every bend, eliminating the flow restrictions that crush-bent piping creates.

One of the best off-the-shelf front mount intercooler options available for the 1997–00 Subaru GC8 WRX and STI.

Front Mount Intercooler Kit — Toyota Hilux N70

The Process West Front Mount Intercooler is built for N70 Hilux owners who demand real-world performance and long-term durability. Engineered to OEM-level fitment standards and validated through rigorous real-world testing, this is a serious upgrade for serious use.

Bar and plate core. The 550 x 265 x 65mm bar and plate core delivers a significant increase in cooling surface area and overall thickness over the factory unit. Bar and plate construction is chosen for its superior heat dissipation, durability, and impact resistance — the toughest intercooler type available.

Proven real-world results. Process West engineers tested the Terra-Tuff against the factory intercooler under identical real-world conditions — a loaded N70 carrying 650kg up a 4km, 310m elevation climb at 80km/h. The factory intercooler peaked at 44°C. The Terra-Tuff peaked at just 23°C. That's a 48% improvement in cooling efficiency, translating to real gains in power, torque, and engine longevity through reduced EGT figures.

Piping built to last. Four-ply moulded silicone hoses, high-durability constant tension hose clamps, and mandrel bent aluminium pipework combine for factory-level integrity across the entire system.

Isometric rubber mounts. The intercooler core is mounted on isometric rubber mounts, allowing it to flex with the vehicle under demanding off-road conditions. This reduces strain on mounting brackets and hose connections for a longer service life.

The definitive intercooler upgrade for your N70 Hilux build.

Designed not only with market leading performance in mind, OEM level durability is also part of the TERRATUFF arsenal, offering manufacturer style design and fitment, followed through with industry leading testing and validation.

This means that when you fit a Process West Intercooler system to your N80 Hilux you have made a choice to have not only the best charge air cooling, resulting in significant power and torque gains, but you have also chosen a product that will last the life of your vehicle no matter what you throw at it. 

N80 Hilux Process West Design Philosophy AND Parts
Heart of the Process West Intercooler system is a durable front mounted Bar and Plate intercooler core.

All intercoolers use Bar and Plate construction due to not only its effective cooling and heat-sink capability, but also because it is the most durable and impact resistant of all intercooler types. Measuring in at 590m x 230mm x 78mm the N80 Hilux core also offers a massive increase in cooling surface area as well as overall thickness.

The traditional bug-bear of intercooler upgrades – piping integrity – has also been addressed with the Process West system.

Specifically moulded silicone hoses of four ply construction are utilised throughout, and when combined with high-durability constant tension hose-clamps, tying to the mandrel bent aluminium pipe-work, the result is of factory quality and dependability.

A final (and important) part of the TERRATUFF design is the use of isometric rubber mounts for the intercooler core. This means that in extreme conditions – such as demanding off road use – that the intercooler itself can flex its mounts with the rest of the vehicle and relieve strain on the mountings and pipe-work. The long term effect of this is no cracked mounting brackets and reduced likelihood of ever failing a hose connection.

As you can see by now the Process West TERRATUFF intercooler solution is a serious product for long-term serious application.

Ranger/BT50 Process West Testing
There is no point in putting a vehicle on the dyno to try and show the effects of intercooling on performance.

While there might be a little torque or power gain, the job of the TERRATUFF intercooler upgrade is to work in real-world conditions without the assistance of a climate controlled dyno room and the cooler itself fed with artificial airflow from a fan. This might convince some to buy intercooler upgrades, but it doesn’t really tell you how, or even if, they work.

Instead the Process West engineers took a different approach to validate the TERRATUFF design. Real world simulation rather than a dyno run was decided on, and with that in mind the team put together a test rig for our development Ranger to show the precise and measured result of fitting a Process West TERRATUFF intercooler upgrade. The schedule for this testing is laid out below –

N80 Hilux is loaded with 650kg of concrete blocks in the tray
A standardised 4km uphill run with an elevation of 310m (nearly 8% avg grade)
Hold 80km/h road speed using Cruise Control (with only a small traffic speed variance)
Use our racetrack developed AIM datalogging system to measure all of the pertinent data points to ensure the data for complete cooling effectiveness is generated.

This test procedure was carried out back to back with both factory and Process West TERRATUFF intercoolers on the same day in the same ambient conditions.

Looking at the datalogging shows that the factory intercooler peaked at 39C (with a faster rise to temperature) than the Process West TERRATUFF intercooler system which peaked at just 24C. That’s a massive 38% improvement over stock cooling with Process West TERRATUFF.

The gains this shows are three-fold with not only hikes in Torque and Power you can feel through the seat of the pants, but there is also the flow on effect of reduced EGT figures to help the engine live a longer and happier life.

The Process West Throttle Adaptor Pipe is designed for those installing the Process West VB FA24 Intake Manifold. The manifold repositions the throttle body lower and closer to the firewall than the factory design, so this adaptor pipe ensures a clean, straightforward connection to your intercooler piping.

Broad compatibility. Fits directly with any Process West Front Mount Intercooler Kit for the 2022+ WRX. Multiple angled silicone couplers are included to accommodate other aftermarket front mount intercooler kits as well.

A simple solution for a clean FA24 intake manifold install.