well, i got a manifold with no catalytic convertor on it. yeah, not gutted, there is no CAT at all. it got louder, but other than that, i couldn't really tell any difference.. aside the more abundance of noxious fumes..

*fixed* 1998.5 Contour SE Zetec
No Cat, SVT Dual Exhaust, 2 N1 Mufflers, IAT , Diablo Chip, Iceman Intake, Polished TB, "new tranny"

Various other crap, no more mods for a while, just moved.

17.391 @ 81.03 mph

1995 Honda Civic CX Hatchback

15.34 @ 91.67mph

stuff.