97-98 STI 3 & 4, JDM WRX , 22B Std 260-280 bhp (on UK fuel)

Level 1 Std car UK fuel Map (original JDM map is for 100 octane fuel) 290-300 bhp

Standalone Apexi Power FC Fully Mapable ECU with 4 x Boost/Power settings in-car adjustable

Level 2 310-330 bhp

Full Decat or Sportscat exhaust from turbo back 2.5 or 3” bore
Walbro 255 l/hr uprated fuel pump
Apexi panel filter with resonator delete
Fuel Lab turbo specification fuel pressure regulator with fitting kit & gauge
Standalone Apexi Power FC Fully Mapable ECU with 4 x Boost/Power settings in-car adjustable
NGK PFR 7B uprated spark plugs

Level 3 370-400 bhp

Full Decat turbo back 3” bore exhaust system.
Tubular exhaust headers and flow matched uppipe
Walbro 255 l/hr uprated fuel pump
Fuel Lab turbo specification fuel pressure regulator with fitting kit & gauge
High Flow multi spray fuel injectors 550cc (440cc std)
STI V7/8 TMIC & matching undertray
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Front mount intercooler
AFP 05-20G custom ported turbocharger
Apexi Induction System
Standalone Apexi Power FC Fully Mappable ECU with 4 x Boost/Power settings in-car adjustable 
NGK PFR 7B uprated spark plugs

Level 4 400-420 bhp

Full Decat turbo back 3” bore exhaust system
Tubular exhaust headers and flow matched uppipe
Walbro 255 l/hr uprated fuel pump
Fuel Lab turbo specification fuel pressure regulator with fitting kit & gauge
STI V7/8 TMIC & matching undertray
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Front mount intercooler
Custom cold air induction system
High Flow multi spray fuel injectors 740cc
AFP 321H custom turbocharger with fitting kit
Standalone Apexi Power FC Fully Mappable ECU with 4 x Boost/Power settings in-car adjustable
Custom Cold Air induction kit
NGK PFR 7B uprated spark plugs

Note The V3-4 Sti Gearbox is stronger than the UK or previous versions however Level 4 + Power may shorten the life of the transmission this will depend on type of use

and driving style

Level 5 430-460 bhp

Full Decat turbo back 3” bore exhaust system
Tubular exhaust headers and flow matched uppipe
Walbro 255 l/hr uprated fuel pump
Fuel Lab turbo specification fuel pressure regulator with fitting kit & gauge
STI V7/8 TMIC & matching undertray
0r
Front mount intercooler
Custom cold air induction system
High Flow multi spray fuel injectors 740cc
AFP 321T custom tubro charger with fitting kit
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 420 bhp on this model 
Map sensor upgrade to 3 BAR
NGK racing eight spark plugs

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

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