What is the importance of pipe diameter? Offhand, I would have figured that there's no particular need to upgrade the 1 7/8" pipe... I see import compacts all the time where the exhaust tip is no more than one inch, and their engines are not all that much smaller than a zetec. Shouldn't I be able to do reasonably well with a mildly modded zetec using the 1 7/8" pipe with, say, Magnaflows in place of the resonator and muffler? Would upgrading to 2 1/4" pipe after the flex pipe really make any significant diference?
96 GL Zetec ATX, white with pinstripe, nickname " Sam Smooth " mods so far: CTA intake with homemade heat shield, KVR drilled front rotors & carbon pads w/ 500° fluid planned mods: exhaust (want to keep it quiet), e-ram (awaiting installation), diablo chip involuntary mods: compression increased after head gasket failure
| 
