

GrimmSpeed OEM Downpipe to 3in Cat Back Adapter
Subaru Turbo Models
Features & Product Details
RallySport Direct proudly carries a great selection of quality upgrades and accessories brought to you by GrimmSpeed.
This is the Grimmspeed OEM Downpipe To 3-Inch Cat-Back Adapter. This 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-inch cat-back exhaust system will meet.
DETAILS:
Specifications
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Fit and worked great. However, I only received one set of washers in the package. I had some on hand so it was no issue but the QC should be better for such a reputable brand.
A must need for doing emissions. Helps swap my catless downpipe for my oem downpipe in a breeze.
I used this adapter for my invidia Q300 single exit exhaust. It's high quality and fitment was perfect with zero issues with the install. Grimmspeed always comes through with quality parts.
Good price, fast shipping, easy install
This looks like a high quality part, but the adapter I received has a sharp edge where the donut gasket sits. I decided to not install this since it will cut into the gasket. So far, it seems like my Remark midpipe is sealing just fine with the gaskets Remark provided.
QUESTIONS & ANSWERS
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Q: Exhaust Jey s.3 years ago
So I recently bought a tomei catback for my 2018 sti do I have to buy the grimmspeed adapter gasket to run the tomei exhaust
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A: Yes, this will allow your stock 2.5" downpipe to bolt to a 3" Tomei exhaust.
Lane H. @ RallySport Direct 2 years ago
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Q: Invidia r400 Ethanjprlta3 years ago
Just to confirm, does this adpator comes with gasket? and do i need it adapter for individia r400?
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A: A gasket is included, you would need an adapter to go from a stock 2.5" downpipe to a 3" cat back.
Lane H. @ RallySport Direct 2 years ago
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Q: Grimspeed catback adapter Josh3 years ago
Hello, I'm planning on buying the Invidia R400 Gemini Single Layer Quad SS Tip Cat Back Exhaust Subaru WRX / STI 2015-2020 and Invidia Catless Downpipe / J-Pipe Subaru WRX 2015-2020 6MT. Do I need the adapter since it wont be a stock j pipe anymore?
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A: No, if you are going to a 3" downpipe, you won't need an adapter to a 3" exhaust.
Lane H. @ RallySport Direct 2 years ago
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Q: Looking to buy this with the Invidia R400 - 2019 WRX alamsas3 years ago
Just wanted to confirm how many gaskets come with this product? I'm guessing the tapered side (female?) is where the oem donut gasket sits in between the adapter and the stock DP? The other side of the gasket is for the midpipe of the exhaust? If there's 2, I'm not sure what the other gasket is for. Wouldn't the invidia exhaust come with a midpipe to dp gasket as well? I'm guessing that goes in between the adapter and the midpipe? Thanks,
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A: This will come with 1 gasket, but you are correct in that the R400 will come with this gasket already, but Grimmspeed includes it just incase you don't have one. Hope this helps. Thanks!
Rick C. @ RallySport Direct 3 years ago
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Q: Gap between stock DP and Tomei SMsubaru3 years ago
when bolting up the tomei with the adapter and donut gasket to stock DP there is a gap between the two pipes. Is this just supposed to press against the donut gasket and be sealed? Ive got it torqued down pretty tight and doesnt appear to be leaking but it just looked weird to me
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A: Everything should sit flush. Reach out to us at [email protected]rallysportdirect.com and we can help you out!
Johnny M. @ RallySport Direct 3 years ago
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