The intermediate system we tested consisted of a BBK 2-1/2-inch short off-road X-pipe and a set of used unknown brand race-type mufflers with turndowns. This system was a big improvement soundwise over open headers, but we immediately noticed that the engine ran considerably richer, suggesting that the exhaust was acting like a big cork. A test with an O2 sensor exhaust probe showed the engine to be running about two jet sizes fat.

The finished system, fabricated by MagnaFlow's Jim Gose, is a work of TIG-welded stainless steel artwork in its own right. It also made as much power as open headers. And the 4-inch turndowns just look flat out badass.