MAZDASPEED3 Gen1 SS 3" Cat-Back Exhaust

$ 595.00

Availability: Ships in 24 hours
Product Code: 571100

California Residents: Prop 65 Warning

Free Shipping
Maps Available


The COBB Tuning Gen1 MAZDASPEED3 Cat-Back is constructed purely from 304 Stainless Steel. The system starts with a stock donut-style flange that mounts to the OEM downpipe or any stock-replacement downpipe, such as the COBB Tuning 3" Downpipe. Next up is a polished resonator section with attractive rolled end-cap, followed by a polished low-restriction straight-through muffler section, also with this attractive rolled end-caps. A thick stainless-steel 2-bolt flange connects to the final section of the exhaust that ends in a tasteful, slash-cut 3.5" double wall tip featuring an etched COBB logo. This COBB Tuning exhaust system conforms to the SAE dictated 95-decibel exhaust noise level limit enforced by California, as well as other states in the US.


The COBB 3" SS Catback Exhaust was engineered specifically to match the performance needs of the 2007-2009 MAZDASPEED3. The attention to detail that goes into the fabrication of this catback makes it a shame to hide it underneath the car. Manufactured using mandrel-bent T304 stainless steel with a custom resonator and high-flow muffler for optimal performance and reliability. Its factory-like fit, attractive finish and subtle yet deep exhaust note put it safely 11 dB below the SAE J1169 limit.

MAZDASPEED3 Gen1 SS 3" Cat-Back Exhaust
  • 304 Stainless Steel for Corrosion Resistance
  • TIG Welded Throughout
  • Polished 4" Tip
  • Impressive Sound
  • Within SAE J1169 Sound Restrictions

Customer Photos

MAZDASPEED3 Gen1 SS 3" Cat-Back Exhaust is rated 4.6 out of 5 by 14.
Rated 5 out of 5 by from Very high quality Compared to all the others on the market this one stands alone. The cast flange is the first indication that something is different. The fit is outstanding; however, the install was a bit difficult...that is if you don't us your brain. There is the original front pipe bracket that is bolted onto the left rear of the engine. The stock downpipe WILL NOT come out unless this bracket is removed. This can be done by reaching through the left wheelwell with a 3/8 ratchet, 6" extension, and a 14mm socket. One removed the stock pipe practically fell out. The performance is outstanding and the quality is as equally amazing!
Date published: 2014-04-25
Rated 5 out of 5 by from Worth it I had the following criteria when buying a downpip: - pass emissions - not much of an increase in sound This DP has by far surpassed my expectations. Throttle response is vastly improved, turbo spools sooner and the powerband has widened. Sound is great, its a bit deeper and not too invasive when used with the stock exhaust. It took me about two months of research, I always found myself coming back to this. If you are on the fence, buy this!
Date published: 2014-04-23
Rated 5 out of 5 by from Perfect fit, only one complaint. Product is manufactured with a great amount of care. The installation is timely, but not difficult. The product is expensive but, makes up for it in its quality. I think COBB should be able to include new hardware. The old bolts coming out of the car weren't in great condition, so now I'm on the search for new hardware...Overall, fantastic product!
Date published: 2015-01-20
Rated 4 out of 5 by from and away we go! OK so I Accessport V3 a while ago and recently got the TBE, TIH, HPFP, engine mount and all the assorted goodies. I had it all installed over the weekend and I have to say at first I was sort of disappointed... before the install, the car would kick me in the seat of the pants around 3500rpm when the boost would spool up... now with all the new Cobb hardware installed it feels much more linear and smooth across the rpm range. My smile crept back when I got up on the highway, punched it hard from a dead stop and was doing over 100mph as I hit 4th gear... and she was pulling strong right up to the yellow line (the wee lil turbo still can't keep up with the air/fuel hungy 2.3l) Excellent power. Excellent construction. The sound of the turbo and BOV are awesome! And I have to say, it's got a great mellow, deep tone... zero rice, all cajones. Thanks again Cobb!
Date published: 2014-07-14
Rated 5 out of 5 by from Worth it but not the easiest part to install. Just installed this last weekend and it was no walk in the park. Some of the exhaust bolts can be extremely difficult to remove, leverage in the tight space is the issue. I ended up having to cut the small heat shield off with a dremel as the bolt closest to the fire wall stripped (thank you Harbor Freight tool quality). Also I found it necessary to remove the frame cross brace in order to get the stock unit out. Good luck if you do it yourself, a second set of hands is almost essential at times.
Date published: 2015-11-12
Rated 5 out of 5 by from Best part you can buy for your MS3 All I have to say is wow!!! Transforms your MS3 into a BEAST. Fits perfect. Wish it came with new bolts for the CBE connection. Mine were very rusted had to use different ones.
Date published: 2017-12-03
Rated 5 out of 5 by from It ROARSSS ! Had this monster since May 2013 after getting my internals upgraded. gains are very noticeable and the sound is incredibly awesome especially I have an aftermarket cat back exhaust !! good job Cobb ! would definitely recommend this downpipe out there who wants extreme gains and awesome ROAR sound ! PS: i live in a cold weather half of the year and it makes the full turbo back system louder on idle/ driving (but not the annoying droning sound) ! loveeee it !
Date published: 2014-04-23
Rated 5 out of 5 by from Amazing product!!!! After installing this I am amazed by the power gain!!! My Speed feels like a rocket and my tires are screaming. Super quick shipping!!! Too bad Cobb doesn't have their CBE anymore or I'd recommend that. Don't forget the spring bolts when installing this.
Date published: 2014-04-23
  • y_2019, m_7, d_15, h_4
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.12
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_14
  • loc_en_US, sid_571100, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_cobb
  • bvseo_sdk, p_sdk,
  • CLOUD, method:getContent, 146.03ms