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

Price: $1,199.98
Price in points: What are Points?1200 points
Replace your Mazdaspeed 3 full exhaust system with the CorkSport 3.5” Turbo Back Exhaust.

We are proud to introduce the CorkSport 3.5” Turbo Back Exhaust for 2007-2009 Mazdaspeed 3! We combined a cast stainless bellmouth, mandrel bent stainless piping, v-band connections, and straight-through resonators to ensure the CS 3.5” TBE is the BEST in high-flowing exhaust for your speed. Enjoy faster spool and efficient flow all the way up to ~850WHP. All of this in an exhaust that goes from livable and tame while cruising to rowdy when you get on it! Read on for full details and don’t forget to check out the video for sound clips!

Note: This is a complete Turbo Back Exhaust System from turbo flange to exhaust tip. This is the only way to purchase a CorkSport 3.5” Exhaust System because we wanted a true 3.5” pipe from turbo to tip. You CANNOT purchase the Cat-Back Exhaust alone.


2007-2009 Speed 3 3.5 inch 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!

Complete turbo tailpipe Mazdaspeed-3 exhaust

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!

Advisory Notice
  • For off-road & race use only. This means keep it on the track and not on the highway.
  • A check engine light (CEL) will be illuminated on catless and some catted setups as a result of installation.
  • Note: This is a complete Turbo Back Exhaust System from turbo flange to exhaust tip. This is the only way to purchase a CorkSport 3.5” Exhaust System because we wanted a true 3.5” pipe from turbo to tip. You CANNOT purchase the Cat-Back Exhaust alone.
  • Strongly advise against combining this exhaust with a KO4 or CST4 IWG. Overboost/boost spiking may occur on some IWG and EWG setups. Refer to fitment tab for details.
  • If you have a CorkSport Turbo with external wastegate housing, the wastegate will need to be moved to the turbine housing directly and a new dump tube used. Check out the CS EWG Dump Tube for 3.5” Downpipe for more information.
  • NVH (noise, vibration and harshness) in the cabin of your vehicle will be increased by the installation of this exhaust.
  • Only fits on turbochargers with OEM downpipe flange shape.
  • If you have a CS exhaust manifold with EWG on the manifold, the EWG dump tube will fit with CS 3.5” downpipe.
  • Slight modification to rear underbody heatshield required for installation.

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.

How To Install The 2007-2009 Mazdaspeed 3 3.5 Inch Turbo Back Exhaust

It will take you 6-8 hours to install the Speed 3, 3.5 inch Turboback with our installation instructions.

6-8 Hour Install Time

6-8 Hour Install

Difficulty: 4/5

4/5 Difficulty

2-Year Warranty

2-Year Warranty



2007 to 2009 how to installation instructions for a Mazdaspeed 3 turbo back exhaust system

All I can say is WOW! Went from a CPE catted down pipe with stock cat back to this beast. Install was a breeze due to the V-Banded down pipe and fit and finish was on point. I always wished my exhaust had a deeper tone, especially in the higher RPM range and this exhaust did just that. It actually has a much deeper burble to it throughout the entire rev range. LOVE IT. And surprisingly, virtually no drone at highway speeds.

As far as performance goes, I noticed a good bump in power in the mid range especially. The CST4 with EWG is loving how free flowing this exhaust is. I feel like it spools like a K04.. power always in demand.

If you are wanting the highest flowing/best sounding turbo back, look no further. This is the one you want!

P.S. The the tip is HUGE. ;)
Write a review

I'm confused about the post "Could we get this catless" and the answer "This is not available in a catless configuration." I do not see anywhere in the description that this 3.5" Turbo Back Exhaust System has a cat. Am I missing something?

Asked by david | 10/20/2022, 07:57 AM | 1 answer(s)

Hello I have a 2008 speed. Stock turbo, I am not familiar with the nomenclature stated in the write up and the video. My question as follows Can this System be installed with a stock turbo? I still have the stock exhaust system, Piping, cat, resonator etc. Also with this set up will I need a HPFP? Your help is greatly appreciated.

Asked by James agustin | 09/10/2022, 04:29 AM | 1 answer(s)

Could we get this catless

Asked by Edgar | 03/28/2022, 10:44 PM | 1 answer(s)
Mazda performance parts financing is available with CorkSport

Looking to finance your parts purchase and want to get 6 months NO interest on any purchase over $199? Click on the image above for more details.

2007-2009 Mazdaspeed 3
2007-2009 Mazda 3 MPS
2007-2009 Mazdaspeed Axela

Tuning: With the larger 3.5" piping we have found that some IWG (and possibly some EWG setups) will not be able to control boost as well due to the improved flow.

OEM K04 = Possible Mild Boost Spike Not Recommended

CST4 IWG = Possible Boost Creep to ~24psi (auxiliary fueling PI or methanol required) Not Recommended

CST4 EWG = Good (no spike or creep) (CS Manifold and EWG Turbine Housing Tested)

CST5 IWG/EWG = Good (no spike or creep) (CS Manifold and EWG Turbine Housing Tested)

CST6 EWG = Good (no spike or creep) (CS Manifold and EWG Turbine Housing Tested)

ATP Turbo = Not Tested

BNR Turbo = Not Tested