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

Does this car have the old forge BPV with the nina sword sound?

CorkSport Reply:Yes it does.

Sam Plapp01/14/2014, 05:42 PM

Hey CorkSport, I currently have a MagnaFlow Cat-Back exhausted system installed (3inch tubing). Just wanted to make sure the catted downpipe option will align/fit with the magnaflow and would I need a 65 or 80 connection?

http://www.magnaflow.com/02product/displayapplications.asp?partnumber=15557

CorkSport Reply:The Magnaflow exhaust necks down to the stock size donut so you will want our stock fitment racepipe.

Eric Nelson12/18/2013, 04:46 AM

Man Big Thanks to My Hommie G CornDizzle, You know why! Greatly appreciate it bro I'm actually hanging the letter on the wall! After Tonight It's Big Boy Power from here on out!!!

I'll point pics of before and after, and video of stock take off vs CS DP. CS team yall make me feel safe using yalls products because I know I cant trust that theyre made right and will keep my $30,000 investment going strong!!!

Matthew Newton12/17/2013, 07:21 PM

Will I be ok installing a downpipe+high-flow cat on a 2010+ mazdaspeed3 and leave all other exhaust parts oem?

CorkSport Reply: An upgraded fuel pump would need to be installed. A tune is a good idea as well.

Danno Nahabedian12/08/2013, 06:53 PM

I just got my down pipe as a b-day gift ;-) lucky me lol!, I spent an hour or so on Friday doing installation of course I did not finish because it got dark, then finish everything up next day. Starting from instruction on how to instal to the product itself, everything was perfect. The final result is just wow! Sound wise, it got a deeper, robust, louder but not too loud tone, which by the way I love it(still stock exhaust on my car). Performance wise, the kick you get from the higher torque is a huge difference, the only bad thing is I cannot hit it too much because I am waiting for my HPFP(high pressure fuel pump) internals in order for me to hit my car as hard as possible. Main points so far, installation is a pain in the but but Corksport make it as painless as possible with their great instructions and awesome product quality which by the way, CS down pipe has better fitment than stock. If you get down pipe please get HPFP since is a must or you will blow up engine. Corksport, what an amazing job you did. Extremely happy with product, result, customer service, etc.

Omar Gutierrez11/24/2013, 10:36 AM

I will say this product was a breeze to install. Taking the old down pipe off was not as easy. I installed this with the cat back and catted down. So far no check engine light so thats awesome hope it stays that way. The oxygen sensor socket is a must for this install as well with a lot of patience. But in the end well worth it. Love the sound with the cat back. I will post back later after i throughly test it. thanks CS.

Steven Jablonowski11/21/2013, 06:27 PM

Hey CS so will Autotech Hi-Volume Fuel Pump Upgrade Kit support my CS TBE?

CorkSport Reply:yes it will.

Aaron Stark11/13/2013, 05:24 PM

Hey CS I just got the catted turbo back exhaust from you guys and I was wondering if it will hurt my fuel pump or internals. can I leave those stock while im runnin the turboback exhaust plus the CS stage two SRI?

CorkSport Reply:We recommend upgrading your pump with the TBE exhaust. Please be careful until you get them.

Aaron Stark11/12/2013, 09:17 PM

They are so polished & shiny; artwork! More power than I expected! Sounds like a mature roar, not too loud, just loud enough. Now for my Stratified Etune!

Barry White10/28/2013, 07:55 PM

What DP can i get for California legal use?

CorkSport Reply:No downpipes are legal in California.

Branden G.10/05/2013, 08:05 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)