[USAZR1]

2.75" exhaust tubing is pretty rare, except in some oem applications, so for all practical purposes, 2.5" and 3" is the sizes you will see most. A good mandrel-bent 2.5" exhaust can easily handle 450rwhp and is much easier to fit.

If you want a nice sound with very little to no drone, check out Dynomax's Super Turbo line of mufflers. They're made in many lengths so you should be able to find a pair to fit a C3.