i can tell you this much, i had new pipes put on my tour from the cat back (2.25") and my big ole annoying 'RAAAAAR' muffler, which i'm sure has little to no restriction (as i can see right through it) and i can tell the cars throwin unburnt fuel into the exhaust after running it hard frown


-Speed Demon- Matt
Black 2000 Contour SE Sport (duratec/atx)
got body mods?
all show, better than stock go smile
"I might be crazy, but I'm not stupid"
speddmn.com