CP-E | Downpipe 3" HI-FLOW CATTED - Mazdaspeed3


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Custom Performance Engineering (CP-e) is an American company that specializes in custom high quality parts

CAD $868.70

CAD $1,022.00


Reduced price!

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CPE Cast Bellmouth to 3" Downpipe


  • Close to +20HP at the Wheels
  • Extra O2 bung for adding a wide band sensor
  • Cast Stainless Steel Flange
  • Cast Bellmouth
  • Industry-leading stainless steel flex joint
  • Stainless Steel honeycomb high flow cat
  • Full 3.00” mandrel bent 304 stainless steel

The cp-e™ MS3 downpipe replaces the choked factory pipe and its two restrictive cats and a 3″ mandrel bent pipe.  The result of our efforts is reduced backpressure, decreased turbo spool time, increased horsepower and a more aggressive sound. For the greatest dose of great sound and power, option for the downpipe without a catalytic converter, though keep in mind that a cat free downpipe is for off-road use only.

Although more power and great sound are high priority items when buying a 3″ downpipe, the fine details are what ensure that the product will satisfy the end-user for a lifetime.

The cast bellmouth piece on the downpipe ensures smooth flow and transition. The downpipe includes three Oxygen Sensor bungs – two for the factory sensor and another to add an aftermarket wideband. Our Off-road version also includes the cp-e™ Tunable O2 Sensor kit to eliminate the unwanted check engine light.

The downpipe comes complete with all necessary hardware required for a complete and professional installation.

* A Tune and the purchase of an HPFP (High Pressure Fuel Pump) is strongly recommended with the purchase of this part. *

2007-2013  Mazdaspeed3

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