Grassroots Motorsports magazine just had an article about race exhausts and they tried a few different setups that also showed power made/lost and also sound readings for each setup.
What I would like to know is what you guys are running. My current setup is a Techtonics header with a straight through glasspack type muffler that terminates with a turn down just forward of the rear axle beam. I pass sound control just fine, but it seems with it terminating under the car the sound is amplified in the car. Even with ear plugs in I get some ringing.
Would the current glasspack muffler be too loud if I put in an over the axle pipe and exit it out of the stock location? What else could I do to keep from going deaf?