I have Fenton Headers on my 248 GMC, with 2 1/4" pipes into 2 1/4" Corvair turbo mufflers, then 2 1/4" tail pipes. Not loud at all but at around 2500 RPM has some "rap" to it, which I like a lot. Both pipes are on the left side and exit under the bumper in chrome 8" long tips (2 1/4" too).