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GrimmSpeed OEM Downpipe to 3in Cat Back Adapter ( Part Number:GRM 077046)

GrimmSpeed OEM Downpipe to 3in Cat Back Adapter

MODEL # GRM 077046
Manufacturer Part # 077046

$39.00

2-3
weeks
Ships within 2-3 weeks
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Description
Exhaust leaks seem to be an all-too-common issue with most modded Subaru’s. They tend to spring up out of nowhere and cause hours of troubleshooting headaches. One of the most common leaks that we hear about is from running an OEM downpipe with an aftermarket 3" catback without a proper adaptor. Use an adaptor that allows you to retain your stock donut gasket for the best solution to finally end that pesky leak.

CNC machined from mild steel and zinc coated for durability and longevity, this thing will outlast your car. Don't waste your time trying to get your OEM downpipe to seal without a donut gasket. In a short amount of time, they rust and corrode and will prevent you from ever getting a good seal with a typical flat gasket. Re-use your stock donut gasket along with a GrimmSpeed 2x Thick 3" Gasket for a perfect seal on the first try!
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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: Grimmspeed
Gasket Layers: 3
Material: Stainless Steel
QTY: 1

Mfgr. Warranty: Limited Lifetime
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
  INSTALLATION INSTRUCTIONS

4.8

5 STAR
88%
4 STAR
10%
3 STAR
2 STAR
1 STAR
2%
Verified Purchase

good, but could improve
sbeidler 2 months ago
so i used this adapter to mate my Invidia N1 Race to my stock downpipe. aside from my rusty old( actually not very old) downpipe flanges bending with almost no torque on the bolts it actually sealed very well with a new donut gasket. My only concern is the very cheap bolts and the tiny washers that are supplied with the kit. I wound up doubling the supplied washers with bigger washers since the wholes on the N1 system are very big for adjustment. Other than the hardware, the pieces them self seam very solid and well built. Could be a little cheaper, but if it keeps it from leaking and does its job correctly i can look past the price ill probably change the bolts out in a few weeks or so when i get a downpipe depending which one i get.
Verified Purchase

Very satisfied!
CarlosWrx 2 months ago
Had the stock downpipe, needed this adapter for my Invidia q300 exhaust fit perfect!
Verified Purchase

Great quality!
Sugoi12'WRX 3 months ago
This adapter is amazing. Fits perfect between my OEM DP and 3in exhaust. This also comes with a much better gasket than the one that came with my new exhaust. I did order the OEM donut gasket as well, but was not sure where it went. I did a live chat with a staff member and was told I did not need the OEM gasket but in their Q&A's they mention getting it with this adapter... I was able to make both fit without any issues and haven't noticed any leaks. Besides not having any instructions, I do recommend this part as it makes the installation for a new exhaust much easier.

Get a Donut!
Boostaru29 3 months ago
Great adaptor. Makes installing a Catback to OEM downpipe or to a Cobb Downpipe a breeze. Don't be stingy like me and skimp out on the donut gasket. I got the OEM catback off and broke the donut gasket in 2 pieces. was 8 at night so couldnt complete the swap until the morning. I live in a small town and had to stop at 3 different places to get another donut gasket the next morning. Take my advice. spend the extra money and save yourself the hassle of driving around looking for a donut gasket.
Verified Purchase

A necessary inconvenience
vash337 6 months ago
Having held on to my GS "3in dp to stock catback" adapter from my last car, it was inconvenient to discover I needed this piece which came to 60 bucks with 2 day shipping. But it's necessary for an easy install. Just bite the bullet and get it. I plan to hold on to both for the future instead of possibly repurchasing.

  • Q: Dp  2011sti 28 days ago

    Answer

    Do i need this to use a aftermarket dp with a stock exhuast?


    • A: This is for a stock downpipe to a 3 inch catback. You will actually want part number GRM 077044 for a 3 inch downpipe and stock catback.


      Evan M. 27 days ago
  • Q: Donut gasket too?  Evansr06 2 months ago

    Answer

    I have a 2013 wrx and am thinking of Cobb catted DP with N1 dual. Do I need to use this 3in to 2.5in adapter as well as a new donut gasket at the same time? Or is it recommended?


    • A: It is recommended to use the OEM doughnut gasket along with the adapter.


      Jared A. 2 months ago
  • Q: Car fitment   gwoody420 5 months ago

    Answer

    Will this fit on my 09 sti hatchback And why does it not need spring bolts


    • A: This does fit your 2009 STI and it comes with aftermarket bolts that replace the spring bolts.


      Tyler G. 5 months ago
  • Q: Invidia n1 catback.   gingerdrummer01 6 months ago

    Answer

    Would this adapter work for connecting an Invidia N1 race to the stock downpipe on a 2002 WRX wagon? Thanks for the help.


    • A: Yes this would be the correct adapter. You may also want to purchase a new donut gasket.


      Tyler G. 6 months ago
  • Q: Hello  jbang267 9 months ago

    Answer

    Hello, I was wondering if i had a Cobb catted downpipe Will this adapter work if i get a 3" catback system?


    • A: Yes, this adapter will work with that system and downpipe.


      Josh P. 9 months ago
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