Since I put a set of Edelbrock 64 cc heads and a Comp Thumpr cam in my vette the aggressive exhaust lift and duration of this cam made my original Spintech mufflers twice as loud, which is ok but where I live it's not a great idea so I called Ron at Spintech seeking his recommendations giving the small area I had to work with and he suggested these mufflers. They sound great, didn't loose alot of volume but enough. Here's a video I have on Youtube and there is a previous one with the smaller spintechs if anyone is looking for a different exhaust sound than the usual magnaflows, flowmasters, etc. check it out.
http://www.youtube.com/watch?v=BdoSrdvKGhk
