[arpad_m]

I heard several Borlas and Corsas in person, and would have also considered AWE (along with many others here) if they offered NPP valves.

These aftermarket exhausts are all top notch, but the stock NPP exhaust is very good, too. The only possible complaint I see there is the WOT rasp that gets a bit stronger with long tube headers. As stated above, it mellows out a bit with age, but a slightly deeper rumble would still be nice.

Oh, and let's not forget the aero effect of the ugly, but useful stock suitcase muffler, these third party exhausts all create huge cavities in front of the diffuser, the airstream squeezes against it pretty strongly, causing turbulences. I painted the suitcase matte black with high temp paint, which blends well into the rear underbody.