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Please call us on 07973 787812 or email sales@greenwoodracing.co.uk for availability.

All pipes are compatable with standard Impreza exhaust pipes.

Noise tested to 98db at 4500rpm.



GRD Drag Exhaust System - Weighing in at just 16KG`s this exhaust is possibly the lightest on the market - a massive 40% lighter than the standard system. Using fully slip jointed stainless steel construction this exhaust gives exceptionally good flow as it utilises a very straight and smooth exhaust path.

With a unique Screamer Pipe design this exhaust system vents exhaust gases seperately from the exhaust turbine and turbo waste gate through a main 3" pipe and a second 1.5" pipe. Other exhausts on the market use an open neck design causing the paths of the exhaust gases collide once the turbos wastgate is opened, causing exhaust gas turbulance and reducing the speed at which gas can flow creating backpressure. This in turn slows down the turbo reducing the speed at which and its ability to flow air and causes exhaust gas to stay in the combustion chamber longer creating unwanted heat buildup, lowering the point of ignition advance before detonation will occur. This exhaust will give the advantage over a regular open neck downpipe of the ability to increase ignition advance, increase the speed at which the turbo can spool up and the amount of air which it can flow. All leading to a significant increase in both power and torque.

Our chosen manufacturer has vast amounts of experiance in motorsport exhaust design and fabrication including building the exhaust system for the McLaren F1 LM where with the help of there free flowing exhaust managed to raise power from 627HP on the standard car to 680HP on the LM.


All Models: 900.00 inc. VAT



GRD Race Exhaust System - Weighing in at under 16KG`s this exhaust is possibly the lightest on the market - a massive 40% lighter than the standard system. Using fully slip jointed stainless steel construction this exhaust gives exceptionally good flow as it utilises a very straight and smooth exhaust path.

Specification is as our Drag Exhaust System but instead re-vents exhaust gas from the screamer pipe back into the mainpipe reducing noise levels to help comply with both track and road regulations.

Our chosen manufacturer has vast amounts of experiance in motorsport exhaust design and fabrication including building the exhaust system for the McLaren F1 LM where with the help of there free flowing exhaust managed to raise power from 627HP on the standard car to 680HP on the LM.


All Models: 750.00 inc. VAT


GRD Sport Exhaust System - Weighing in at just 16KG`s this exhaust is possibly the lightest on the market - a massive 40% lighter than the standard system. Using fully slip jointed stainless steel construction this exhaust gives exceptionally good flow as it utilises a very straight and smooth exhaust path.

Fully Road Legal and MOT friendly this exhaust has all the same features as the GRD Race Exhaust System but uses a 300 CELL Sports Catalitic Convertor to help it to conform with current MOT exhaust emmisions requirements. This will however reduce exhaust gas flow, slightly reducing potential power output especially on high power applications. Our chosen manufacturer has vast amounts of experiance in motorsport exhaust design and fabrication including building the exhaust system for the McLaren F1 LM where with the help of there free flowing exhaust managed to raise power from 627HP on the standard car to 680HP on the LM.


All Models: 1100.00 inc. VAT

Exhaust Heat Wrap - 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.
All Models: 50.000 inc. VAT per roll (2" x 50ft)

GRD Jap Style Back Box - Subaru Impreza New Age angled Jap style back box gives approx 2-3 BHP gain over conventional style back box.
All Models: 234.00 inc. VAT

GRD Subtle Back Box - The back box is the original style Scooby design back box, subtle in terms of looks and sound.
All Models: 234.00 inc. VAT

GRD 2nd De-Cat Pipe - The cat pipe replaces the 2nd cat on a New Age Impreza, which can be removed without messing up the ECU and is still MOT friendly. This can also be supplied with a high flow cat.
Newage 01 - 05: 100.00 inc. VAT
Newage 06 onwards: 106.00 inc. VAT

GRD Centre Pipe & Silencer Replacement - Centre pipe straight through replacing centre silencer.
Classic: 88.00 inc. VAT
Newage 01 - 05: 100.00 inc. VAT
Newage 06 onwards: 100.00 inc. VAT

GRD De-Cat Down Pipe - Down pipe with an open mouth in 3" to fit either 2.5" standard/after market centre pipe or a genuine 3" down pipe.
Classic: 194.00 inc. VAT
Newage 01 - 05: 185.00 inc. VAT
Newage 06 onwards: 185.00 inc. VAT

De-Cat Up Pipe - This Up Pipe has no restrictive Cat increasing flow and compliments our 2.5" Stainless De-Cat System.
All Models: 125.00 inc. VAT

GRD Full 2.5" Turbo Back Straight Thru' 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.
Newage 01 - 05: 550.00 inc. VAT
Newage 06 onwards: 550.00 inc. VAT

GRD GT Spec 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.
Newage 01 - 05: 450.00 inc. VAT
Newage 06 onwards: 450.00 inc. VAT