97-98 UK/Euro Std 215 BHP

Level 1 260-280 bhp

Full Decat or Sportscat exhaust from turbo back 2.5 or 3” bore 
Walbro 255 l/hr uprated fuel pump
K&N Panel filter and resonator delete.      
Standalone Apexi Power FC Fully Mapable ECU with 4 x Boost/Power settings in-car adjustable 
Level 2 290-310 bhp
 
Full Decat or Sportscat exhaust from turbo back 2.5 or 3” bore
Walbro 255 l/hr uprated fuel pump
Standalone Apexi Power FC Fully Mapable ECU with 4 x Boost/Power settings in-car adjustable
Apexi induction system
High Flow multi spray fuel injectors 550cc (380cc as std)     
AFP 04-H custom ported Turbo
Uprated turbo to intercooler 'Y' pipe
NGK PFR 7B uprated spark plugs


Level 2(a)   300-320 bhp

Substitute  VF34/35 or TD05-16G turbo in place of AFP04H for additional 10-20bhp but with slightly later turbo spool up.     


Level 3 360-390 bhp

Full Decat exhaust turbo back 3” bore
Tubular exhaust headers and flow matched uppipe
Walbro 255 l/hr uprated fuel pump
Stand alone fully mapable SimTek ECU with twin maps, permitting use of different fuels or octane booster
and elimating the original MAF sensor which is limited to approx 350 bhp
Apexi Induction System
High Flow multi spray fuel injectors 550cc
AFP 05-20G custom turbo charger.
Fuel Lab turbo specification fuel pressure regulator with fitting kit & gauge
STI Version 7/8 TMIC & matching undertray     
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Front mount intercooler 
NGK PFR 7B uprated spark plugs

Note Level 3 Power may shorten the life of the transmission system this will depend on use and driving style.


Level 4 390-410 bhp

Full Decat turbo back 3” bore
Tubular exhaust headers and flow matched uppipe
Walbro 255 l/hr uprated fuel pump
STI V7/8 TMIC & matching undertray     
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Front mount intercooler 
Fuel Lab turbo specification fuel pressure regulator with fitting kit & gauge
Stand alone fully mappable SimTek ECU with twin maps, permitting use of different fuels or octane booster
and elimating the MAF sensor which is limited to approx 350 bhp on this model
High Flow multi spray fuel injectors 740cc
AFP 321H custom turbocharger with fitting kit     
Custom Cold Air Induction system
NGK PFR 7B uprated spark plugs


Level 5 420-450 bhp

Full Decat turbo back 3” bore
Tubular exhaust headers and flow matched uppipe
Walbro 255 l/hr uprated fuel pump
STI V7/8 TMIC & matching undertray     
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Front mount intercooler 
Fuel Lab turbo specification fuel pressure regulator with fitting kit & gauge
Stand alone fully mapable SimTek ECU with twin maps, permitting use of different fuels or octane booster
and elimating the MAF sensor which is limited to approx 350 bhp on this model.
High Flow multi spray fuel injectors 740cc
AFP 321T custom turbocharger with fitting kit     
Map sensor upgrade to 3 BAR 

Note We do not recommended level 4-5 standard internals-clutch or gearbox as a mimium we recommend forged pistons
and steel rods, steel head gaskets, uprated clutch. We also recommend either a PPG gear kit or 6 speed gearbox conversion ( from later STI) 

PLEASE NOTE

We have included the tuning section us a guide to what we consider to be the most cost effective steps during tuning. This has been compiled with the benefit of experiencing hundreds of upgrades. There are other parts/turbos that can be substituted but the listed parts we have found to give the most consistant results over many installations.

Your own ideals may vary depending on the parts you may currently have fitted.

Our suggested levels are compiled to mimise incompatible components, it is not ideal to fit a turbo that your fuel system cannot support for example,

We do not do parts fitting here so I can't give you a full price, the components in the tuning stages are listed in order to allow you to select the most cost effective route to power and in turn allow us to achieve the best results from your car.

Our core business is ECU Custom Mapping and Hybrid turbocharger design/building. We are not here to try and sell you the parts with the biggest profit margin, we can however supply (for local collection or mail order) all the tuning parts listed if required. Optionally you can source them yourself or arrange for the garage doing the fitting to supply them. The individual parts prices can be found on the website on their respective pages

We can recommend specialist garages within a 100 mile radius that work with us on a regular basis to fit the parts if required. These garages have been specially selected as places that are very experienced specifically with Subarus and work on a daily basis with this type of car. We recommend them as we know they will look after your car and their attention to detail will ensure maximum reliability. It is perfectly safe to have the parts fitted and then drive to us off boost (this still allows cruising at 70mph) for final setup and custom mapping. We have had cars drive over 400 miles to have this done.

Predicted BHP figures are approximations, our section on “rolling roads” explains in some detail why it is impossible to give exact figures.