GRD STI Stage 4 Plus - 504.3BHP / 444ftlb Torque With Full Time Anti-Lag Running VP 109ron Race Gas, 485.18BHP / 145ftlb Torque Running 485.1BHP / 415ftlb Torque on Bio-Methanol Fuel.

Please call us on 01403 250743 or E-mail to book a test drive in our Stage 3 Demo Car.

This car has the following Packages installed.

GRD STI Stage 4 Tuning Package With Optional Extras

Custom Turbo With Garrett GT30 Roller Bearing Internals - Custom Turbo With Garrett GT30 Roller Bearing Internals.

Samco Turbo Inlet Pipe - This Samco Turbo Inlet Pipe omes with integral aluminum inlet reinforcing ring and 5 aluminum vacuum spouts. This fits underneath the inlet manifold and has been developed for hybrid turbos with a 76mm inlet.

GRD 3.5" Straight Thru' De-Cat Stainless Steel Exhaust System - Optimum gas flow and minimal exhaust back pressure is essential for high power. Exhaust system design parameters immediately after the turbocharger are critical not only for outright performance, but for optimum torque and turbo response. Free Flowing Catalytic Converters to suit this exhaust are available.

GRD Stainless Steel Exhaust Manifold And Turbo UpPipe - Made from high grade stainless steel pipe work, flanges and smooth flowing joining faces thus removing and kind of gas flow restriction. This results in an increase in torque, engine response and a smoother delivery of power.

Hyperflow Monster Front Mount Intercooler - The system is fully complete and ready to bolt on, retains the Factory fog lights, does not compromise strength, requires no cutting and is supplied with the Hyperflow Billet mounts and blow off valve bracket. A high flow Intake system is also required with the Monster Intercooler System, fully engineered Rampod and cold air intake systems are available from Hyperflow to compliment the system.

Hyperflow Wing Mount Air Intake - Unlike ram pods which source hot air from under the bonnet, this system delivers cold air from the inner guard for optimum engine performance.

Syntek Motorsport Fuel Pump - A crucial part to any engine modifications, is the ability to reliably supply your engine with enough fuel. This pump directly replaces the standard unit and has the ability to supply 2.25 litres per minute @ 5 bar pressure. The standard pump generates 1.1 litres per minute @ 5 bar.

650cc Fuel Injectors - They are 650cc and will improve your fuel delivery for high safe horsepower when used in conjunction with one of our Fuel Pumps.

Apexi AVC-R Boost Control - The A'PEXi Super AVC-R is the ultimate boost controller. It is the only boost controller on the market boasting an integrated injector pulse monitor. It is the only boost controller on the market engineered to increase boost response (up to 1500 RPM in some vehicles). The A'PEXi Super AVC-R is the only boost controller with an RPM-specific self-learn mode which allows the boost controller to memorize the boost characteristics of a particular vehicle and adjust the boost pressure accordingly. This allows the unit to control boost unlike any other unit on the market. Vacuum and boost pressure are shown on the unit's easy-to-see display. A series of colored LED's also serve as a bar graph and monitor for the unit's various functions. The booster controller is a boost duty setting that allows the user to control the amount of boost overshoot. The Super AVC-R is the only boost controller that combines the self-learning mode with an RPM specific overshoot protection feature for unparalleled boost stability. There are no dangerous calibration modes associated with Fuzzy Logic systems.To control boost, the Super AVC-R uses a high-quality solenoid valve as opposed to a stepping motor. This is the same technology that was used on the turbocharged Honda F-a race cars. These solenoid valves are proven to control boost more accurately and are much sturdier in design and construction than a stepping motor. The Super AVC-R reads information from an injector pulse signal wire from the vehicle's ECU and a self-contained pressure sensor. The signals are then interpreted by the AVC-R and used to control the solenoid valve. Gear Judge Feature allows full boost to be achieved in every gear giving huge gains in performance. Switchable settings allow for low and high boost to suit driving conditions.

EcuTek ECU - We use EcuTek software to reprogram your ECU via the diagnostic port of the car. We retain all the car's clever electronics but re-map ignition curves, fuel maps and the closed loop boost control system. The ECU remains programmable so if in the future something needs to be changed then we can. The only way to tell that that either conversion has been performed is to drive the car. There are no visual clues. Even the Subaru diagnostic tool does not show that the ECU has undergone brain surgery.

Rolling Road Tested - Our Dyno Dynamics chassis dynamometer measures engine power via the driving wheels in an accurate and repeatable method. Your vehicle's dyno runs are recorded in real time, and printed out in full color for your records.

Optional Extras

Exhaust Downpipe And Manifold Heat Wrapped - This serves 2 purposes. To reduce heat soak into the engine bay and to keep the internal pipe wall temperatures up to aid the removal of waste gases through the exhaust system.

Turbosmart Blow Off Valve - Features the unique variable exhaust port system resulting in superior venting of excess pressure, a popular choice for the street. Fully adjustable via Turbosmart's unique Quick Wrist action (no tools required). Supplied with full fitting kit (where required). Easy DIY fitment.

Hyperflow Engine Oil Cooler - An oil cooler has a number of advantages: it increases the volume of oil in the system which means each unit of oil is doing less work, and lowering the oil temperature will reduce engine operating temperature dramatically.

Hyperflow Oil Catch Can - Oil vapour can rapidly reduce the octane level of fuel by contamination of the combustion chamber. By diverting this vapour and allowing it to condense in an oil catch tank, you not only remove this vapour and unwanted crankcase pressures, but also help reduce the chance of piston detonation.

Hyperflow Anti-Surge Fuel Pod - It is recognised that fuel surge does occur with light fuel loads in the Subaru WRX, leading to starvation. This shortens range on the track and adds mass to the vehicle, with unnecessarily high fuel loads for Super Sprints and track racing.

Hyperflow Baffled Sump - Fitted with a sophisticated internal baffle system for enhanced surge control under extreme G Force conditions. The Sump provides a number of benefits when compared with a standard unit. A 35% increase in Oil Sump capacity. A finned Billet machined base plate to significantly increase cooling. Heavy Duty Alloy construction and thick billet base plate to reduce chance of puncturing. Two levels of internal baffling to dramatically reduce oil surge. Precision machined billet mounting flange - perfect fit.

DEFI Guage Kit - Includes Oil Temp Guage, Oil Pressure Guage, Boost Pressure Guage and Mounting Pod.

GRD Aquamist Kit Running 50/50 Methanol And Water - The main function of these systems is to suppress detonation caused by high temperature and pressure developed within the combustion chamber.

GRD STI Twin Plate Clutch Package

Exedy Racing Hyper Twin Plate Clutch - The Exedy Hyper Twin Plate Clutch is designed for high torque capacity with "reasonable" steetability. The friction facing material is cerametallic to bundle the abuse of highly modified engines. Again, with all cerametallic clutch systems, some chatter should be expected on low rpm startups. Featuring a single spring damper for both discs, this clutch design has strap lift and drive for both the pressure plate and the intermediate plate. A patented system evenly lifts both the main pressure plate and the intermediate plate providing a "clean" release for steetability. Comes with lightened Racing Flywheel.

GRD STI Stage 4 Handling Package

AST Competition Suspension - These AST shock absorbers are 3-way adjustable high-gaspressured competition shocks. They are supplied with an external reservoir and a 12-clicks lowspeed and an 11-clicks highspeed compression damping adjustment. The rebound damping performance is adjusted with an extremely sensitive 12-clicks adjust knob. They have a high strength mounting bracket. The competition damper provides the maximum grip and optimum control needed to convert the enormous power of your competition car into performance on the track. Constructed from light weight aviation aluminium with an anodised finish and ultra-low friction bearings for both extension an compression strokes. We guarantee the best performance for every competition-driver. Correct adjustment of the damper guarantees a successful improvement of the carís performance to the track surface and the conditions of the day.

Whiteline Adjustable Front Anti-Roll Bar 24mm - This is the 24mm Front Adjustable Anti-Roll Bar from Whiteline for those wanting to play with the roll bar stiffness. Their objective is to reduce sway, or bodyroll, and stabilise a vehicle under lateral (cornering) forces.

Whiteline Adjustable Rear Anti-Roll Bar 24mm - This is the 24mm Rear Adjustable Anti-Roll Bar from Whiteline for those wanting to play with the roll bar stiffness. Their objective is to reduce sway, or bodyroll, and stabilise a vehicle under lateral (cornering) forces.

Whiteline Anti-Lift Kit - Whiteline Anti-Lift Kit (ALK) is designed to add 0.5 deg static positive castor to both front wheels while introducing a substantial amount of front anti-lift. The anodized alloy mounts coupled with the low compliance polyurethane bushings oppose front lift under acceleration while delivering up to +1 degree more positive caster. This leads to superior traction, reducing understeer allowing more power, faster acceleration and cornering. The additional static caster coupled with the new firmer bushings, deliver more dynamic caster dramatically sharpening initial turn-in response, forcing more consistent alignment angles through the corner allowing higher exit speeds.


Geometry Laser Tuned -

Optional Extras

Whiteline Front & Rear Drop Links - These forged aluminium links reduce flexing and therefore effectively increase the rear roll bar stiffness; this helps reduce any natural tendency to understeer.

GRD STI Stage 1 Brake Package

EBC Red Stuff Ceramic Pads Front & Rear - This is a truly impressive fast road pad for repeated heavy braking. It emits far less dust than semi-metallic pads and has been proven to stop a saloon car 13 metres quicker than OEM pads from 100mph/160kph. Features EBC Brake-InTM surface coating which conditions rotor surface and accelerates pad bed-in.

EBC Turbo Groove Discs Front & Rear - The wider slot actually draws cool air across the pad surface keeping pads and rotors cooler. They also expel dust, dirt and hot gases better than fine slots which eventually fill with rust and scale and become ineffective in our opinion. The blind drilled holes break down surface gases when braking from speed but do not weaken the rotor cross section as can happen with through drilling, thereby lessening the chance of rotors cracking over time and heavy use.

GRD Full Vinyl Sticker Set

Full GRD Vinyl Car Set - Includes 3 large Greenwood Racing Developments logo's, 2 large GRD logo's and 2 web site address (www.greenwoodracing.co.uk) logo's.