Optimal flow and minimal back pressure are the keys to any turbo powered car. Knowing this, Custom Performance Engineering (CPE) set out to engineer a cat-back system that features smooth mandrel bends and a muffler designed to minimize backpressure and promote faster spool up. The dyno-proven results of this effort speak for themselves, with a broad increase of horsepower and torque across the entire operating range of the engine.

(Please note: Dyno graphs are comparisons of factory stock SPEED6 versus SPEED6 with CPE Cat-back with 14-inch Round Resonator; there were no other performance modifications to the test car!)

The cat back system is manufactured using polished 304 stainless steel. All tubing is made in the USA by American Stainless Tubing, Inc.(ASTi) The tubing is all supplied in a super buff finsh exclusive to ASTi's manufacturing technology.

Cat Back kit includes 3" tubing, 12" oval muffler, optional resonator, stainless steel band clamps, and gasket for stock downpipe.

The first two shots below are the horsepower dyno graph and the torque dyno graph.

You can also listen to a sound clip here.