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COBB Tuning Downpipe Catted Bellmouth - Subaru WRX 2008-2014 / STI 2008+ / Forester XT 2009-2013

MODEL # COB 524203
Manufacturer Part # 524203

$595.00

24
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RallySport Direct 2011 Subaru STI Project Car POWER Kit ( Part Number:RSD 11STIPCP)
RallySport Direct 2011 Subaru STI Project Car POWER Kit
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Description

RallySport Direct is proud to provide you with quality performance and racing products brought to you by COBB Tuning. 

On this page, you are looking at the COBB Tuning Catted Bellmouth Downpipe. This is a great upgrade because it combines smooth bends and a larger piping diameter which will result in an improved throttle response, reduced turbo lag, increase in both horsepower and torque, all while providing an aggressive exhaust note.

Here are the key features:

  • CAD designed
  • Single 400-grade stainless steel high-flow catalytic converter
  • 304 Stainless steel construction
  • 3" piping diameter
  • Tapers to a 2.5" stock flange
  • Factory style 02 sensor provision

Note that this downpipe will require a tune to maximize the full performance potential. 

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RallySport Guarantee - 30 Days


Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.

Specifications


Brand: COBB Tuning
Includes Catalytic Converter: Yes
Installation Hardware Included: No
Mouth Design: Bellmouth
Piping Coating: No
Piping Flex Joint: No
Piping ID: 3.00in
Piping Material: 304 Stainless Steel
Piping Taper: Yes
Tuning Required: Yes

Mfgr. Warranty: 1 Year
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days


Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
RallySport Guarantee
WARNING: This product contains chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm.

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Verified Purchase

Downpipe overview
Wrx2014hatch 2 months ago
When first pulling it out of the box you can really see the craftmanship that went into making it the price it is, and why it’s a high seller. When comparing it to the stock downpipe you can really see how much the stock one restricts the flow. The diameter is significantly bigger, and the material and quality is far more. The install process takes time, but isn’t frustrating as long as you have the proper tools and setup for the job. I’d definitely recommend buying extra screws however, gasket, donut ring. You can definitely hear a change in the tone(deeper) and throatiness compared to having just a catback(Cobb) setup. It’s not much louder, but does give it a slight increase in the two I just mentioned. It sounds great when you really get on it, and gives off more pops when both up and down shifting. When flashing to the stage two tune you can definitely see a performance gain as it pulls harder in each gear and puts down more boost. I really enjoyed the car a lot more around twisty hilly roads. The power was there when you needed it. I’d say it’s well worth the upgrade
Comment
Verified Purchase

Great product
Bill Nye the STI guy 2 months ago
This downpipe is really nice. I got a recommendation from my tuner at first because I was not too familiar with the pros and cons of bellmouth downpipes vs divorced wastegate downpipes, and still being on the factory turbo with the internal wastegate, I opted to go with the bellmouth style. I added this along with an Invidia N1 Race catback, and I must say I'm loving the sound. Not raspy at all, and has a nice deep rumble. You can even hear the turbo in the exhaust as well. Not only that, but having had the Cobb SF intake and airbox already, I feel like this added a little extra BPV noise. Having switched from the stage 1+ map to the stage 2+ map, I have seen an improvement of over .3 seconds in trap times in the quarter mile, and feel a very nice improvement in power and torque. Overall install was easy. The worst part is fighting with rubber exhaust hangers. But after a little soapy water, everything hooks up easy. Fitment is perfect, and the only bit of advice I have is dont forget to re-torque the exhaust bolts after it's been driven. Oh. And another thing, when the other reviews say that the factory downpipe is restrictive, thats an understatement. This downpipe is very obviously less restrictive to the naked eye, and has a very nice increase in pipe diameter. I would also just recommend to purchase a new turbo - to - downpipe gasket as well, because when i took mine off it was obviously worse for wear. But yeah. 100% recommend this Cobb Catted Bellmouth Downpipe.
Comment
Verified Purchase

Great product
Bill Nye the STI guy 2 months ago
This downpipe is really nice. I got a recommendation from my tuner at first because I was not too familiar with the pros and cons of bellmouth downpipes vs divorced wastegate downpipes, and still being on the factory turbo with the internal wastegate, I opted to go with the bellmouth style. I added this along with an Invidia N1 Race catback, and I must say I'm loving the sound. Not raspy at all, and has a nice deep rumble. You can even hear the turbo in the exhaust as well. Not only that, but having had the Cobb SF intake and airbox already, I feel like this added a little extra BPV noise. Having switched from the stage 1+ map to the stage 2+ map, I have seen an improvement of over .3 seconds in trap times in the quarter mile, and feel a very nice improvement in power and torque. Overall install was easy. The worst part is fighting with rubber exhaust hangers. But after a little soapy water, everything hooks up easy. Fitment is perfect, and the only bit of advice I have is dont forget to re-torque the exhaust bolts after it's been driven. Oh. And another thing, when the other reviews say that the factory downpipe is restrictive, thats an understatement. This downpipe is very obviously less restrictive to the naked eye, and has a very nice increase in pipe diameter. I would also just recommend to purchase a new turbo - to - downpipe gasket as well, because when i took mine off it was obviously worse for wear. But yeah. 100% recommend this Cobb Catted Bellmouth Downpipe.
Comment
Verified Purchase

Instant powah!
Twobicycle 4 months ago
This is probably the best thing i have done to my car besides the AP. The stock DP is highly restrictive and this pipe with the Grimmspeed heat-shield went in easy as hell. I am currently running the DP to my stock exhaust (besides the axel back exhaust) and loving every dollar i spent. Highly recommend this to everyone.
Comment

Quality Downpipe!
Kichoman 7 months ago
Installed this a few months back on my 2012 STi which already had the Tomei cat-back. As most people already knew, the Tomei is obnoxiously loud (a tad bitter with the silencer installed). With this Cobb downpipe, the car is only slightly louder but the rumble sound is less deep. It almost sounds "raspier". I also installed Ecutek and had it custom e-tuned (stage 2). It didn't throw any codes even before I flashed my ECU. On the street, I have to keep my silencer on otherwise it is just unbearable and it draws too much attention around the city. On the track, I have the silencer off and it sounds like a beast. The car accelerates so much quicker especially in S#. Night and day difference. Not sure how that tiny cat will help in emission test (yes it still exists in my country), but I got this catted version mainly for keep the noise down. This downpipe does tapered down to stock diameter just before the flange, so you would need an adapter gasket (I have the Grimmspeed) if you plan to run a 3" catback. No leaks, easy to install, 5 stars easily.
Comment

  • Q: Bolt up to Borla?  U.K. 15 days ago

    Answer

    I have a Borla Catback exhaust, specifically model number 140312. Would there be any issue bolting this up? Additionally, should I be entertaining a stage 2 clutch at this point? I also have the Cobb SF intake and accessport with stage 1+ tuning.


    • A: Unfortunately, you would need an adapter, and you should not need to upgrade your clutch.


      Devan M. 14 days ago
    • A: Should I use the Invidia instead? Or would that need an adapter, too? Is this adapter something a standard exhaust shop would have?


      U.K. 11 days ago
  • Q: Fitment  Dominus 22 days ago

    Answer

    Hi will this Cobb Dp mate with the fujitsubo 2.75" catback? If not which dp will fit?


    • A: The downpipe tapers down to a 2.5" so it will not fit and unfortunately, we do not sell a downpipe with 2.75" diameter.


      Devan M. 22 days ago
  • Q: Fitment  Sti2277 1 month ago

    Answer

    Does it fit a nameless catback exhaust? Do I have to buy any gasket? If I do, what kind of a gasket should I buy? Does it require an upgrade of fuel injectors and fuel pump? BTW I have a 2018 Subaru STi


    • A: We cannot confirm fitment on the catback to downpipe, therefore we cannot answer the rest of the questions.


      Devan M. 1 month ago
  • Q: Cobb dp to invidia r400  G 1 month ago

    Answer

    Will the Cobb down pipe bolt up to the invidia r400?


    • A: They will bolt up, but since the Cobb uses an OEM style flange, you'll want to use a OEM downpipe to 3 inch catback adapter to prevent exhaust leaks.


      Marcus E. 1 month ago
  • Q: Cobb dp to invidia N1 catback racing exhaust  Rico Suave 9 months ago

    Answer

    Will this dp run direct fitment to the invidia N1 racing catback exhaust single exit? and will I need a pro tune or can I run the OTS stage 2 on the Cobb accesport. Currently running cobb stage 1 with cobb sf intake and invidia N1 racing catback thanks.


    • A: An adapter will be recommended when using this downpipe with a full 3 inch catback like the N1 due to the Cobb using a donut style gasket like OEM but some choose to not use one. It will install exactly like the OEM downpipe you have now. The Cobb Stage 2+ map will work great with the Downpipe and Cobb intake.


      Evan M. 8 months ago
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