GrimmSpeed Stock Downpipe to Aftermarket 3-Inch Catback Adapter Subaru WRX/STI Turbocharged Models

GrimmSpeed Stock Downpipe to Aftermarket 3-Inch Catback Adapter - Subaru WRX/STI - Turbocharged Models

Exhaust leaks between a factory downpipe and an aftermarket 3-inch catback are one of the most common headaches on modified Subarus. GrimmSpeed's adapter (SKU GRM077046) solves it properly by letting you retain the factory donut gasket instead of fighting a flat gasket against a corroded OEM flange. It's a simple, purpose built fix for anyone running a Subaru WRX or WRX STI with a 3-inch catback.

This listing covers turbocharged Subaru WRX and WRX STI models fitted with a factory downpipe or j-pipe and running an aftermarket 3-inch catback exhaust, spanning GC8, GDA/GGA, GE8/GH8, GF8, GV8/GR8, VAG, VBH and VNH WRX chassis, along with GDB, GRF, GVF and VAB STI chassis.

Note: This adapter reuses your factory donut gasket at the OEM flange. Inspect it for rust or damage before fitting, as a worn donut gasket will leak regardless of the adapter fitted.

Key Features

• Flanged to suit the OEM donut gasket with machined lip centres
• 2-bolt gasket flange design
• CNC machined from mild steel with a zinc coating for durability
• Includes GrimmSpeed 3-inch 2x thick gasket for the catback side seal
• Supplied with quality mounting hardware
• Straightforward bolt on installation

Vehicle compatibility, OEM part numbers, and fitment notes are provided in the tabs above. Please confirm your downpipe and catback configuration before ordering.

Not sure if this adapter suits your build? Contact our team at sales@chicaneaustralia.com.au for expert advice.