yeah, but the fast is 102mm with matching throttle body. which i suppose isn't that much different with the few things i've done to the motor, but i'm trying to think big picture. i'm also considering picking up a set of 243 or 799 heads, and porting them out and throwing in some roller rockers. Its got the 706 craptech heads right now. i heard something about only porting the exhaust side, and leaving the intake side alone. or the other way around. the guy at the parts desk at the dealership was telling me you lose power if you port both. i just cant remember which ones he said to port.