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COBB Tuning Downpipe Catted Bellmouth (Part Number: )
COBB Tuning Downpipe Catted Bellmouth (Part Number: )
COBB Tuning Downpipe Catted Bellmouth (Part Number: )
COBB Tuning Downpipe Catted Bellmouth (Part Number: )
COBB Tuning Downpipe Catted Bellmouth (Part Number: )
COBB Tuning Downpipe Catted Bellmouth
Subaru Automatic Legacy GT 2005-2009 / Outback XT 2005-2009
Read 4 Reviews | 2 Q&As
Part # 524212

Only 2 left!

Features & Product Details

When shopping for a downpipe, you know that COBB Tuning is a brand you can trust. They are pioneers of the game especially when it comes to making horsepower out of a Subaru. This is a CAD designed bellmouth downpipe that is equipped with a single high flow catalytic converter. Basically this allows for much better air flow than the factory unit, and combined with COBB’s Accessport makes for an easy an efficient means of making horsepower.

These downpipes feature 304 stainless steel construction, and has the factory style location for the 02 sensor provision.  The actual catalytic converter is fabricated out of 400 grade stainless steel that has a much higher flow rate and a longer lifespan compared to ceramic or “brick” style cats. This reaches a faster operating temperature with cleaner cold-start emissions. There will also be a second 02 sensor provision for the other 02 sensor.

Finally this is 3” in diameter for piping size, however it does taper to a 2.5” stock flange.  And this downpipe is compatible with any cat-back exhaust that mates to the factory cat section. 


Brand: COBB Tuning
Includes Catalytic Converter: Yes
Installation Hardware Included: Yes
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
Catalytic Converter Cell Count: 200
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
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4 Reviews
5 out of 5 Stars
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
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When you need your performance parts quick contact Rally Sport Direct 2 years ago
5out of 5stars

Great company to do business with great selection FAST service! , Quality parts!
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Cobb DP for Sub Leg GT 05 AT 6 years ago
5out of 5stars

The improvement noted with the Cobb downpipe and uppipe upgrading to Cobb Stage 2 vs Stage 1 is really impressive. The turbo lag is almost nil and the torque increase feels like it starts in the really low revs. With Stage 1 it was almost an on/off switch, which was fun, but could be a problem in heavy traffic because you could run up someone's rear bumper if you weren't judicious with the throttle. This is so smooth, progressive, bonkers with the power (more torque than a Stage 1 STI), and (here's how you impress your hippie friends) my highway MPG went up 11%! I'm a little nutty about tracking that, and it's a legit number. I was going to trade in my legacy for an Audi S4; that was before the mods. Now that would be a big drop in torque and fun. Kudos Cobb!
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'09 OBXT DP 7 years ago
5out of 5stars

Great work Cobb! The turbo lag in all conditions is considerably less, can feel the increased torque as well, not to mention the turbo really sings now. Exactly the tune I was looking for without the high exhaust note.
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2 of 2 people found the following review helpful
down pipe 8 years ago
5out of 5stars

I owne a 2005 subaru outback XT. This product was easy to install and I can really feel the power difference. Before when you would put the pedal to the metal it took a bit for the turbo to kick in now it is almost instant power. The only issue I had was I had to destroy the O2 sensor to get it out and then I was out another $200 buying a new one. I recomend buying the Cobb heat shield to. Do not run the car without IT!!!!!! Seriously. One more thing I did not have to remove my intercooler.
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  • Q: Gaskets included?  decodeddiesel192192 years ago

    Does this downpipe include the turbo to downpipe gasket?
    • 0 of 0 people found the following answer helpful

      A:  Cobb does not include gaskets with their downpipe. You will want to get a new turbo to downpipe gasket and a new donut gasket to make sure you are leak free.

      Evan M. @ RallySport Direct 2 years ago  
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  • Q: CEL & emissions  scubad4 years ago

    Can I still pass emissions with this downpipe? Will I have a CEL?
    • 0 of 0 people found the following answer helpful

      A:  We cannot confirm emissions results with any of our products, they are meant for offroad use only. A CEL will be present if you do not tune the vehicle properly.

      Nick S. @ RallySport Direct 4 years ago  
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