Did a few Google searches tonight concerning the G-Power SKIII. Technik kept telling everyone stock compression and 9.5psi, but the below description tells a different story.
Basis: M3 V8, 420 hp (309 kW) increased to 650 hp (448 kW)/650 Nm consisting of:
Forced induction: ASA T1-725 supercharger including overrunning clutch ASA K07; supercharger lubrication through bypass from motor oil circuit; ultra stiff CNC shaped supercharger bracket system made from aluminum including an extended support-aggregate belt-drive for the superchargerís drive; pneumatic controlled, engine load related boost control; flow optimized, large volumetric fresh air intake, including 8 integral resonance induction pipes made from light polyamide, ensuring an optimal throttle response and a perfect torque curve racing air filter. Boost level approx. 13 psi rel.
Intercooling: Large volumetric intercooler system using flow optimized boost pipes made from casted aluminum and a large, high capacity air to air intercooler made from aluminum in the car's front.
Engine modification: 8 fuel injectors with enlarged mass flow; 8 weight optimized forged pistons for a reduced compression ratio of 10:1 supplied from our technological partner Mahle, 8 balanced, weight optimized
and reinforced con-rods
Exhaust system: G-POWER complete exhaust system SPEEDFLOW, optimized exhaust conduction through dynamic pressure reduced exhaust system including first catalysts replacement pipes, two racingcatalysts, intermediate muffler and G-POWER full stainless-steel sport rear silencer with 4 x 83 mm tailpipesfeaturing the M-design look.Electronics: Custom made software for the standard BMW engine and DKG- transmission electronic controlunit (BMW OBD stays completely untouched), enabling an unlimited top speed of max. 320 km/h, accordingto the capacity of the tires.