2008+ Subaru Impreza 2.5 STI (UK/EU) Performance Upgrades
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+44 (0)1684 850999 +44 (0)7887 622177 +44 (0)1684 850700 info@litchfieldmotors.com like us on facebook subscribe on youtubeOpening Hours
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| Saturday: | 9:00am - 3:00pm |
We have owned all versions of the Subaru Impreza STI hatch in both UK and Japanese specifications.
Development of our performance kits has been on going with Litchfield owning a number of demonstrators and test vehicles since the cars launch in late 2007 to present day to insure our customers receive the very best upgrade solutions available.
Our Hatch STI's have been critically acclaimed by the Media and have been tested on most circuits including and numerous trips to the world famous Nurburgring.
We also use these Subarus as our day to day transport so our products are also proven and refined in real world environment where they will spend most of their time.
We worked closely with Milltek Sport to produce a 3" High performance exhaust for the UK and European STI Hatch Back range. This genuine 3" Turbo back system features 3 silencers, a 100cell Motorsport Catalytic convertor and stylish quad tail pipes. Not only is this system environmentally friendly it also helps release extra performance from the 2.5 engine whilst keeping a subtle but purposeful exhaust note. The exhaust system can also be specified without the Catalytic convertor to reduce the cost (off road use only).
As with all our Milltek systems it is made in the UK with the highest quality aircraft-grade stainless steel and manufactured to tight ISO 9001 quality controlled standards. The new exhaust also offers a substantial weight saving over original system.
Using the latest Ecutek software called RACEROM (which we helped develop) the engine management system can be recalibrated to take full advantage of the exhaust systems free flowing design increases power from the standard 296bhp to around 345bhp. Torque also improves significantly with changes to the variable exhaust timing and improved turbo response allowing the STI to generate over 350lbft from as little as 3,500rpm. This gives fantastic throttle response and overtaking power.
As part of our standard RACEROM remap we offer full Map Switching and Per Gear Boost Control using the Si-Drive for improved fuel economy and in-gear performance. The reprogramming of the ECU is also based on the latest Subaru calibration revision to insure the upmost reliability is retained.
The addition of our new 73mm Cold Air induction kit increase power even further with the engine revving more freely at higher rpm. Removing this restriction also gives a sporty intake noise on boost and improves the throttle response even further.
Stage 1 345bhp - £1,995 inc. VAT
- Litchfield Designed Milltek 3" Exhaust with 100 Cell high flow Sports catalytic converter
- Performance Air Filter
- Labour to fit
- Custom ECU remap using ECUTEK's RACEROM software
Note: This kit is available for £1,595 inc. VAT for the DE-CAT version of the Milltek system
Stage 2 355bhp - £2,260 inc. VAT
- Litchfield Designed Milltek 3" Exhaust with 100 Cell high flow Sports catalytic converter
- Performance Air Filter
- Cold Air Induction Kit
- Labour to fit
- Custom ECU remap using ECUTEK's RACEROM software
- Increase engine peak power rpm
- Improved Throttle Response and Turbo pickup
Note: This kit is available for £1,929 inc. VAT for the DE-CAT version of the Milltek system
Stage 3+ 2.5 Engine Builds
We have a huge amount of experience with building new 2.5 engines that will be able to reliably handle more power. Please contact for more information.
MY2008+ 2.0 Japanese specification Subaru Impreza STI upgrades
We have a huge range of performance upgrades for the 2.0 Japanese STI engine ranging from our Twinscroll Milltek exhaust all the way to our latest Twinscroll turbo options. Please call for more information.