2007-2009 Mazdaspeed 3 - 3.5 inch Turbo Back Exhaust System

The CorkSport Advantage

Performance Boost:

The Mazdaspeed3 3.5” Turbo Back Exhaust was developed to be the ultimate CorkSport exhaust. The 3.5” diameter piping and bellmouth design are capable of efficiently supporting ~850+WHP. That power level has been made plenty of times on a 3” exhaust, however, a 3.5” exhaust typically will make the same power on less boost or even make more power with minimal tuning changes. For lower horsepower cars, the 3.5” piping shows benefits to turbo spool time. In our testing, on a car with built motor and supporting mods, we’ve seen spool time to 30psi decrease by up to 300-500RPM compared to a typical 3” exhaust! This car also held boost better at higher RPM due to the added flow.

Sound & Volume:

The added flow of the 3.5” CS exhaust also adds a great new sound and some volume to your MS3. By using high flowing straight through resonators, we were able to eliminate drone and unwanted sounds from the exhaust without impacting horsepower levels. We created a system that is livable and enjoyable while cruising yet loud when you hit the skinny pedal. The CS 3.5” exhaust has comparable volume levels to our existing cat back exhaust but, the extra-large pipe offers a unique deep tone that we haven’t heard on most other MS3 exhausts!

Fitment Focused:

With the larger pipe, we wanted to not only provide great fitment but make it easier to install your downpipe. By separating the upper and lower sections of the DP, the piping is no longer in the way when tightening the DP bellmouth to the turbo. Plus, we designed the bellmouth to incorporate clearance for sockets and/or wrenches for tightening. You can even leave the bellmouth attached to the turbo in case you need to remove the downpipe or turbo for maintenance! The rest of the exhaust was designed for direct OEM fitment, despite the huge pipe size. No modifications are required for installation & we even supply polyurethane hangers to ensure the exhaust stays in position with no rattles or vibrations.

Materials & Manufacturing:

The CS 3.5-inch TBE uses a cast 304 stainless steel bellmouth for long-term strength and reliability. From there back, all piping uses CNC machined V-band flanges TIG welded to mandrel bent 304 stainless piping. CNC machining ensures a leak-free seal, TIG welds ensure high strength, and mandrel bends ensure smooth exhaust flow. We control sound using straight-through resonators with high-quality packing materials. Finally, the exhaust is finished off with a polished dual layer tip in 112mm (4.4”) diameter with an engraved CorkSport logo. All combine to make an exhaust that looks, sounds, and performs great that will take all the abuse you can throw at it!

Hardware and Accessories:

Included with your CS 3.5” exhaust is everything needed for installation. This includes stainless v-band clamps, brand-new downpipe mounting studs & lock nuts, and replacement polyurethane exhaust hangers. We include the CS poly hangers to ensure no vibrations or rattles with the tight fitment of the 3.5” exhaust. Finally, the thing we’re most proud of is our custom MLS downpipe gasket included with each kit. We port-matched it to the DP bellmouth & CST6 to ensure no flow restrictions whatsoever!

Additional Features

• Vehicle Fitment: 2007-2009 1st Gen Mazdaspeed 3, 2007-2009 Mazda 3 MPS, 2007-2009 Mazdaspeed Axela.
• Designed & Developed in America: Designed, tested, and validated in Vancouver, Washington, in the Pacific Northwest.
• CorkSport Service & Support: Receive a 2-year warranty, full-color installation instructions, all of the needed installation hardware, and knowledgeable telephone installation support at (360) 260-2675.