Modular Mazdaspeed 3 Downpipe

Get maximum turbo performance and dramatically increase power and torque with the CorkSport Mazdaspeed 3 “Modular Series” 3 Inch Downpipe. The new V2 design uses our modular system to improve flow, enhance fitment and make installation simpler in your MS3 engine bay. The design utilizes a cast stainless steel bell mouth with a v-band connection to 3” stainless steel piping. Available with fitment options for an upgraded 3-inch/80mm exhaust or fitment with a stock/2.5” exhaust. Plus, it fits all years of MS3! Check out more information and pictures down below!

Read The BlogCorkSport Mazdaspeed 3 Downpipe Now Available with High-Flow Catalyst

The CorkSport Advantage

Performance Focused:

The CorkSport V2 Downpipe drastically improves exhaust flow compared to the restrictive OEM downpipe. This results in gains of up to 50whp & wtq on a stock turbo car with an intake, HPFP upgrade, and a tune. Even larger gains could be expected for cars with an upgraded turbo!

Mazdaspeed-3-cast-bellmouth for v2 downpipe

Fitment Inspired:

Knowing the installation can be a huge pain when upgrading your downpipe, we aimed to make installation and fitment much easier with the V2 design. The modular design with a separate cast bell mouth and v-band connected pipe section does just that.

With the 2-piece upper and lower sections of the downpipe, all downpipe nuts are now easier to access as you do not have the lower section in the way while tightening. This allowed for easy stud & nut access as well with cutouts designed to fit sockets & wrenches. Lastly, should you ever need to remove the downpipe or turbo for maintenance, the bellmouth portion can stay attached to the turbo! Just disconnect the v-band clamp and remove the lower DP section from the exhaust.

Exhaust Fitment Options:

The CorkSport V2 Downpipe is designed to fit an upgraded 3” or 80mm exhaust for no flow restrictions. If you want a more sleeper build, there is also an option that necks down slightly to work with OEM and 2.5” diameter exhausts.

Both options will require your catback to use the OEM-sized flange with the donut-style connection for an easy installation with your existing pipes. Both sizes are offered only in a catted setup that is for race use only and is not street-legal in areas with emission controls. The cat itself is a high-flow 3-way metallic foil 300cel CAT with a 4-inch outer diameter.

Materials & Manufacturing:

At the turbo side, the CorkSport modular downpipe uses a cast 304 stainless steel bellmouth for strength, reliability & simplicity. The piping uses a CNC machined V-band flange 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.

Hardware and Accessories:

Included with your modular 3” downpipe is everything needed for installation. This includes a stainless v-band clamp for the bellmouth to DP connection, brand new downpipe mounting studs & lock nuts, and even an O2 sensor harness extension.

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!

NOTE: if you order the OEM-sized outlet option, we recommend you purchase a new donut gasket, as it is not provided. 3” sized outlets include a new donut gasket to suit the larger pipe diameter.

For off-road & race use only.
HPFP upgrade and tuning required for proper and safe operation.
A check engine light (CEL) will be illuminated on catless and some catted setups as a result of installation.
Take note of your catback exhaust size before ordering. There is a different downpipe whether you have a 3inch/80mm exhaust or an OEM/2.5” exhaust.
AXL-6-114-18 Fits Cat-Back Exhausts like the CS 80mm and other 3” exhausts that use the OEM style flange.
AXL-6-114-19 Fits Cat-Back Exhausts like the OEM and other 2.5” exhausts that us the OEM style flange.
Only fits on turbochargers with OEM downpipe flange shape.
If you have a CS turbo and are running an EWG off the turbine housing, the wastegate will need to be moved to the turbine housing directly and a new dump tube used. CS part number GEN-6-575-17 is needed and it is available for purchase HERE.

Additional Features

Vehicle Fitment: 2007-2013 Mazdaspeed 3
Developed in America: Designed, tested, and validated in Vancouver, Washington, in the Pacific Northwest.
CorkSport Service and Support: Receive a 2-year warranty, full-color installation instructions, all of the needed installation hardware, and knowledgeable telephone installation support.
Release Blog:#

How To Install the the Mazdaspeed Downpipe

It will take you Approx. 5 hour to install.

5 hour Install Time

4/5 Difficulty

2-Year Warranty

Yes CEL

I have a question...beside the catless giving u a cel what other potential problems can this dp cause.....just asking...I want to go catless

CorkSport Reply:An upgraded HPFP is a good idea as well as a tune.

Angel Diaz07/12/2013, 11:12 AM

Love the sound i got with stock muffler and great power gains intake dp cobb tune hpfp and i keep up with stage 2 stis!!!!!!!!!! ty corksport

Bryan Beauchamp07/11/2013, 07:16 AM

Are you guys going to make a upgraded manifold? I'm ordering my TBE soon and would love to get a manifold while I'm there

Eddy Ramos07/08/2013, 12:16 PM

Am I gonna be running safe, if I get the system first (install it) and get the AP and HPFP after?

CorkSport Reply:We recommend the installation pump internals with the downpipe.

Rey06/25/2013, 04:38 PM

I am really interested in buying the whole CS TBE system, so before i do that, Do i need AP right away after installing TBE and upgrade my fuel internals?

CorkSport Reply: With the installation of the TBE you will need the HPFP internals at a minimum. We recommend a re-flash or the COBB AP as well.

Rey06/25/2013, 04:02 PM

Can the 65mm be replaced with an 80mm, once a person upgrades to an aftermarket exhaust after having a stock one? Or would a whole new DP need to be purchased?

CorkSport Reply:The catted downpipes are welded units so you would need to replace the whole downpipe to go with the 80mm outlet.

Aaron06/18/2013, 05:30 PM

Absolutely bad ass! Install instructions were good, but I would HIGHLY recommend using a lift. I couldn't imagine how terrible that install would have been on my back. Use plenty of PB Blaster and be gentle with the O2 sensors. My car ran like junk until I upgraded my fuel pump, so I would recommend getting your CDFP internals put in first. With the fuel pump upgraded, it's a brand new car!! Absolutely amazing sound and super smooth pull through the entire RPM range. Corksport always delivers top notch products and this part is no different.

Brandon Graser05/05/2013, 02:21 PM

So if I live in California I can't get the downpipe right? But the catback exhaust shouldn't be a problem with the California regulations though? Thanks

>>CorkSport Reply: Removing catalysts is something which is not legal anywhere. Choosing to do so is up to the owner of the vehicle.

Brad Rainbolt03/25/2013, 10:58 AM

The product was a success and will recommend it to everyone that is considering one. I got the catted race pipe option and love sound and power it puts out.The ms311 is quicker and ready for more ammunition added to its arsenal. Only thing difficult was installation.

Edward Glotzbach03/19/2013, 11:16 AM

I decided to go with a catless downpipe and catless racepipe, to compliment the CBE I'd purchased earlier last year. HUGE difference in sound (and performance, after the tune). In fact, the only complaint I have is less with the product and more with attention to detail. Based on the instructions there should have been two long bolts (to mate the RP and rear exhaust), and two shorter bolts (to mate the RP to the DP), and I was sent 4 of the long bolts instead. (Shoulder of the long bolt goes all the way through the hole, which doesn't allow for any sort of tightening).

Aside from a little on-the-fly fabrication, the parts are AMAZING?!

Charles Hall03/16/2013, 08:00 PM

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On mine (the 80mm catted version), the upper 02 sensor is capped off. Didn’t realize it wasn’t supposed to be until it was already on. Was this just a mistake in mfg. or is there a reason it would be capped off?

Asked by Randy | 07/22/2023, 05:38 PM | 1 answer(s)