Well, a lot, actually. I would recommend using the search function...
The differences are:
-upper and lower intakes extrude honed/larger ports
-extrude honed heads
-hotter camshafts
-more advanced spark curve/tuned for 91 octane
-19lb injectors vs 16.7lb
-higher compression pistons
-conical air filter/air box/air tube
-larger throttle body
-slight differences in the exhaust manifolds (a little better flow)
-2.25" quasi-dual exhaust vs. single 2" pipe
Probably missed something, but that's a pretty good start...
-Lance
