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Long Downpipe for Mazdaspeed3
Quantity in Basket: None
Code: ATP-MS3-011
Price: $299.00
Shipping Weight: 15.00 pounds
Check this box if you want to add the 3" high flow cat option ($200 add'l) back in stock!
option: GT_3"_V_Band_instead_of_Mazda_5Bolt
Long Downpipe for Mazdaspeed3
Long downpipe (replaces both upper and lower downpipes/cats), Mazdaspeed3 (fits 2007 through 2014, 3" stainless, high flow and full 3" throughout. Deletes the restrictive donut gasket found in many other designs and promotes full 3" flow throughout. All CNC machined flanges, 304 stainless tubing, and TIG welded construction. Fully built in the USA.

Please Note: In order to effectively delete that restrictive factory style donut gasket (in order to promote maximum possible flow), we employ(supply) these parts (with the downpipe) to be installed in this order:
1X Thick Flat gasket supplied goes between the rear of the ATP downpipe and the thin (sheetmetal) flange on the catback exhaust.
2X 10mm studs to join the two flanges.
4X 10mm locknuts to go to ends of both studs
2X Regular 10mm washers go on the downpipe side
2X Laser cut "V" washers go behind the thin flange on the catback side to make it more rigid