GrimmSpeed Aftermarket 3-Inch Downpipe to OEM Catback Adapter


GrimmSpeed SKU: GRM077044

In Stock

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A perfect solution to pesky problems - it's what you expect from GrimmSpeed!

Exhaust leaks seem to be an all-too-common issue with most modded Subarus. They tend to spring up out of nowhere and cause hours of troubleshooting headaches. The most guaranteed leak you will get though is if you run an aftermarket 3" downpipe to an OEM or OEM like 2.5" Exhaust. Compare our adapter to the competition and you will immediately see why we offer the best solution to finally end that pesky leak.

Cut from Steel and hand welded these pieces were born tough. With the ability to work with both flat style gaskets AND donut gaskets they cannot be matched. If that wasn't enough we flared out one end to just shy of 3" so that unlike the competitors, our adapter will not block flow!


  • Flared adapter transition creates a smooth transition from your 3" downpipe to your OEM midpipe
  • Flanged for OEM Donut Gasket
  • Indestructible Steel CNC Laser cut construction
  • Simple bolt on installation with included hardware
  • Will Not obstruct exhaust flow like other adapters - Flared end guarantees smooth exhaust flow


  • GrimmSpeed 3in. Gasket and OEM Subaru Donut Gasket SOLD SEPARATELY
  • Adapter is only intended to be used for connecting aftermarket 3in Downpipe to OEM style catback. It can not be used in reverse.