The stock two-piece downpipe on the Mazda SPEED6 is one of several parts that stifle the performance potential of the turbocharged and intercooled MZR engine.  It has crimps, bends, two catalytic converters, and a constrictive diameter.  These attributes were acceptable for Mazda, but not for MAZDASPEED enthusiasts.

The solution to the stock downpipe was as simple as it is elegant.  A single 304 stainless pipe, with a generous 3” diameter, a single high flow metallic cat, and two gentle mandrel bends to contour the Speed6’s underbelly.  The new downpipe represents an obvious improvement over the stock unit in both form and function.