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Features & Product Details
This is the Grimmspeed OEM Downpipe to 3in Cat Back Adapter. This particular adapter is very popular for those of you who are retaining the stock downpipe and need to eliminate any exhaust leaks associated with the addition of an aftermarket 3" cat-back exhaust system. This adapter will allow you to retain your stock donut gasket to make for a great solution to eliminate the exhaust leak where the stock downpipe and your aftermarket 3: cat-back exhaust system will meet.
Grimmspeed CNC machined this gasket from mild steel then had it zinc coated for extra durability and longevity. This gasket is also made in a double thickness sizing to provide a perfect seal.
Hardware will be supplied to make this adapter ready for the installation.
Specifications
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.
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REVIEWS & CUSTOMER MEDIA
I used this while installing a Tomei Expreme Ti on a 2019 WRX STI. It functioned perfectly. I highly recommend!
This was very easy to install for someone who has never done an installation like this before. I installed it on my 2018 WRX when I was swapping the stock exhaust for an Indivia Gemini. No leaks, and everything fit together perfectly.
Installed an Invidia N1 on my 2011 WRX, and had a leak from the downpipe to the midpipe. This plus a donut gasket and about 15 minutes of time fixed the leak extremely well. Definitely recommend if you want to install a 3” catback on a stock downpipe
A must have for anyone running a catback with the OEM downpipe! Hardware is top notch as well!
If there is one thing that makes me the happiest, it’s parts that do what they are meant to do. Made it a dream to put my cat back on! Thank you!
QUESTIONS & ANSWERS
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Q: Cobb Downpipe to Invidia R400 Set up 13 STI2 months ago
I would like to change my current set up to a Cobb downpipe catted bellmouth and to a invidia r400 catback on my 2013 sti sedan, would I need this adapter?
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1 of 1 people found the following answer helpful
A: Yes, you would want this for proper fitment.
Marcus E. @ RallySport Direct 2 months agoWas this answer helpful?
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1 of 1 people found the following answer helpful
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Q: Cobb Catback 04Sti2 months ago
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0 of 0 people found the following answer helpful
A: This adapter would not be needed for the Stock downpipe to Cobb Catback connection. The Cobb Catback tapers down to 2.5 inches like stock. You would just need a donut gasket for the connection.
Karsten B. @ RallySport Direct 2 months agoWas this answer helpful?
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0 of 0 people found the following answer helpful
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Q: Donut Gasket Sam French3 months ago
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0 of 0 people found the following answer helpful
A: Yes, a donut gasket would be required
Devan M. @ RallySport Direct 3 months agoWas this answer helpful?
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0 of 0 people found the following answer helpful
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Q: Invidia N1 Cat Back doucheung08710284 months ago
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1 of 1 people found the following answer helpful
A: Yes, this would be the adapter you want to use when installing any aftermarket 3" catback exhaust on the Stock Downpipe.
Brady R @ RallySport Direct 4 months agoWas this answer helpful?
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1 of 1 people found the following answer helpful
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Q: Tomei ti catback/COBB downpipe Nelson Asay10 months ago
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0 of 0 people found the following answer helpful
A: Yes this should work!
Devan M. @ RallySport Direct 9 months agoWas this answer helpful?
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0 of 0 people found the following answer helpful
