Info on exhaust system enclosed. I'm running a 461 BBC; 10:1, Comp 292 cam, headers. Pypes system was a real bearcat to install. Neither of the up & overs were bent right. Ended up pie cutting and welding both of them. Drivers side was close, passenger side was not. I should have questioned the manufacturer as I noticed both were not bent the same but figured I'd get the run around. I wanted something quieter than the typical Flowmaster 40's sound. Originally I installed Pypes Street Pro mufflers. Sounded nice outside of the car but the interior drone at 40-45 mph with my combination was brutal. Like rattle the interior apart brutal. They lasted 2 months before I couldn't take it anymore. Ripped them off and installed Flowmaster 50's. These are longer than the Pypes mufflers making installation difficult but not impossible.