Description:
GrimmSpeed OEM Downpipe to 3-Inch Cat-Back Adapter, Subaru Turbo
The GrimmSpeed OEM Downpipe to 3-Inch Cat-Back Adapter bridges the diameter mismatch at the OEM downpipe to 3-inch cat-back diameter transition for Subaru turbo models with OEM downpipe. The correct solution for phased builds where downpipe and cat-back use different pipe diameters.
DETAILS
- Diameter transition adapter: OEM downpipe to 3-inch cat-back diameter transition
- Stainless construction
- No welding required
- Fitment: Subaru turbo models with OEM downpipe
When an aftermarket downpipe and cat-back use different pipe diameters, connecting them without an adapter requires custom fabrication. The GrimmSpeed adapter provides a precision-fit transition that connects cleanly at both flanges.
Stainless steel construction handles the exhaust environment. Bolt-on installation using the adapter and provided hardware.
What's in the Box
- GrimmSpeed adapter
- Hardware
Why Choose GrimmSpeed
GrimmSpeed has been engineering performance parts for Subaru platforms from their Portland, Oregon facility since 2003. Everything they make is designed around real-world use, their engineers drive the same cars their customers drive, which means product decisions are made with genuine platform knowledge behind them. GrimmSpeed designs parts in-house, sources quality materials, and validates fitment on the actual application before release. The result is parts that install correctly the first time, perform as advertised, and hold up under the conditions Subaru owners actually subject their cars to. Whether it is a critical engine component or a cosmetic upgrade, the same attention to detail and fit quality applies across the catalog.
The RallySport Take
The correct piece for builds where the downpipe and cat-back specifications differ. Fits Subaru turbo models with OEM downpipe.
Fitment
| Year |
Make |
Model |
Notes |
| 2002-2021 |
Subaru |
WRX / STI |
All turbo models |
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