I just installed a SLP loudmouth system on my '94 Z28. My car is stock besides the exhaust system. It is pretty good sounding right now, but is there anything I could do to make my exhaust any louder without spending any more money or destroying the sound of the exhaust system?

 

you can do what i am about to do to my car and hollow out the catalytic converter...all you do is pretty much unbolt it and there should be a little honeycomb looking thing in there called a catalyst...from what i hear all you gotta do is knock it out...your car should be pretty loud then...i had a v6 camaro that had a gutted cat.. and it sounded pretty good for a 6, but anyways..good luck

 

Gutting the cat is about the only free mod you can do to your exhaust. However, by doing so, you'll probably add alot more rasp to your exhaust note.