Peak power is now 490bhp (up 37bhp) while peak torque also increases to 372 lb ft, an increase of 14 lb ft.. These improvements have come from a new design of piston crown, improved mechanical efficiency thanks to a reed valve in the crankcase to evacuate oil and blow - by gasses, reduced backpressure from a redesigned 4 - into - 1 exhaust manifold and a reprogrammed ECU that exploits advances in the anti-knock properties of the latest petrol formulas. (evo.co.uk)
A special intake manifold design, special «tumble» type intake ports, advanced piston crown shapes, an elevated 11.5:1 compression ratio and a variable - flow exhaust system are keys to the high power output. (netcarshow.com)
The turbocharged inline - four engine produces 228 hp and 236 lb - ft of torque, and it features hemispherical - type piston crowns for improved durability and a special turbo with improved heat resistance. (automobilemag.com)