It's a 3" turbo back GHL exhaust. I added a muffler in the cross pipe for the passenger rear outlet, and then put a mccord powerplate on the driver's side outlet. Driving around on the street the plate is close forcing the exhaust through the muffler. On the strip, the plate is open allowing the exhaust to run straight out the back.

This does remind me though. The MSD works great, but if you use it like I have it will ultimately wipe out your CAT.

 

what about your o2 sensors?