Join Date: Aug 2011
Location: Albuquerque, NM
Ferrari Life Posts: 11,881
Bubbles- No difference in early and late US 550 exhaust systems, so that should give you a lot more choices. Only the 575M has precats, and there were early and late exhausts for that car, the later one having straight pipes instead of the center muffler/resonator. Bradan has a nice set of straight pipes they fabricate and sell. V12s and 180 deg crank V8s do not need x-pipes. They are essentially two 6 cylinder and two 4 cylinder engines on the same crank, and exhaust gasses are extracted just fine. An x-pipe gums up the flow just slightly, but is still way better than the OEM center muffler.
Replacing the center muffler with straight pipes will give you maximum hp and torque, but some people prefer the sound of x-pipes. Difference seen only on a dyno and maybe a little shaved time to 150 mph, which is not a big problem for us in the US.
Present: 575M 135171
Past: Dino 246 GT 02984, 365 GTB/4 14009, 308 GTS 25125
Every day I look around, and if nobody is shooting at me, it is a pretty good day.