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You are here: Mazdaspeed Parts - Home / MazdaSpeed 6 / MazdaSpeed6 Exhaust / Mazda CP-E 3inches SS Downpipe System - MazdaSpeed 6
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The stock downpipe on the MazdaSPEED6 leaves plenty of room for improvement. Loaded with crimps, sharp bends and two catalytic converters, there was much to improve upon. Custom Performance Engineering has completed development of its 3 inch down pipe system featuring mandrel bent stainless steel tubing and an optional high flow catalytic converter. The catalytic converter features an all metallic honeycomb design, making it one of the most durable converters on the market.

The downpipe may be ordered with or without catalytic converters, for use on-road or off-road, respectively. The off-road version features an oxygen sensor provision that greatly reduces the occurrence of the P0420 emissions related OBD-II error code. The catalytic converter equipped downpipe features a metallic monolithic honeycomb catalyst designed for maximum flow and surface area. With the downpipe installed, one can expect better than 20 horsepower at the wheels, and a marked increase in engine responsiveness

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.

The downpipe comes complete with step by step color instructions and all the necessary hardware required for a complete and professional installation.

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