The Magnaflow Super Turbo muffler, Summit part #WLK-17749 2.5" offset
in/out. It's just about the biggest muffler you can fit in there, I
picked it for max sound control. At idle and part throttle, it's pretty
much like stock. At WOT, it's a bit louder than stock. The turbo
spool-up is much quicker, and the pressure just shoots from 2 to 13 psi.
Smooth reduction from the 3" Catco cat to the 2.5" back half.