GrimmSpeed OEM Downpipe to 3in Cat Back Adapter

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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. 



  • CNC machined from mild steel 
  • Zinc-coated for durability and longevity
  • Flanged for the OEM donut gasket
  • Machined lip centers 2-bolt gasket
  • Simple bolt-on installation
  • Includes GrimmSpeed's 3" 2X Thick Gasket