its not 3.5 its just 3 times the weight of the car sould add up to the CCand how do rotaries drive from servo to servo i never heard that rx8 rotors are like that? rotaries are the best 300bhp on just porting and exhaust? dont be fooled by the ca18det the botom end is #OOPS# and is always starved of oil in high rmp so the engine wont stay cool and the engine weights to much for the car it puts the whole drive out like #OOPS# you need even portion weight in the front so its not so heavy in the front. GO THE 12A turbo