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.
Our downpipe can be had with or without catalytic converters, for use on-road or off-road, respectively. The off-road downpipe features an oxygen sensor provision that suppresses the P0420 check engine code. The on-road catted downpipe features a monolithic honeycomb catalyst designed for maximum flow and surface area. With the CPE downpipe in place, one can expect better than 20 horsepower, and a marked increase in engine responsiveness.
The down pipe system is manufactured using polished 304 stainless steel. All tubing is made in the USA by the premier pipe manufacturer, RathGibson, and designed to last the life of the car.
downpipe install 
