Get 10-12 added WHP from your 2007-2013 Mazdaspeed 3 with the CorkSport Power Series Racepipe. By replacing the second catalyst on your Mazdaspeed 3 with this direct bolt on replacement, the severe air flow restriction is removed, providing significant improvements in performance and power.
The CorkSport Advantage
Best Fitment: Options of an 80mm flange for true 3" aftermarket exhausts such as the CorkSport cat-back, or a 65mm fitment for stock catback exhausts.
The CorkSport Advantage
Gains in power up to 12 WHP: when installed on an otherwise stock Mazdaspeed
Minimal exhaust flow restriction: Removes the unmonitored stock second catalyst removing the restricted airflow without triggering an unwanted check engine light
Two available configurations: Available with a 65mm or 80mm outlet diameter for stock or aftermarket exhaust fitment.
Uses factory style flanges: The front connection features a full floating front flange and spherical gasket connections to attach seamlessly to the factory or aftermarket downpipes
Superior construction: Made from TIG welded T304 stainless steel and solid stainless exhaust hangers
CorkSport Service and Support: Receive a 2 year warranty, full color installation instructions, all of the needed installation hardware and knowledgeable telephone support
Important Notes:
If your aftermarket cat back exhaust is designed to bolt to the stock catalyst you will need to order the stock fitment racepipe.
Our racepipe is not recommended to be used with Turbo XS and ATP downpipes due to the flat flange mounting that comes with their products.
Removing a stock catalyst from a road vehicle is illegal in most states. Racepipes are for race use only and are note to be used on the street
*If you plan on installing the CorkSport Downpipe with High-Flow Cat at a later date it will replace the racepipe section of your exhaust.*
Install time             2/5 Difficulty            2 year warranty     No CEL
  
I have the corksport cat back exhaust, should I get 80 mm flange or 65 for this race pipe