GrimmSpeed OEM Downpipe to 3 Inch Cat Back Adapter Turbo Subaru Models

Exhaust leaks are a common headache on modded Subarus, often appearing unexpectedly and causing hours of troubleshooting. One of the most frequent culprits? Running an OEM downpipe with an aftermarket 3" catback without a proper adapter. GrimmSpeed’s 3" Downpipe Adapter provides the perfect solution—allowing you to reuse your stock donut gasket for a reliable, leak-free connection.

Quick Specs

• Flanged for OEM Donut Gasket – Maintains proper fit and sealing
• Machined Lip Centers 2-Bolt Gasket – Ensures perfect alignment
• CNC-Machined Steel Construction – Zinc coated for durability and corrosion resistance
• Simple Bolt-On Installation – Includes quality hardware for easy setup
• Includes GrimmSpeed 3" 2x Thick Gasket – Provides a perfect seal every time

CNC-machined from mild steel and zinc-coated, this adapter is built to last the lifetime of your car. Don’t waste time struggling to get an OEM downpipe to seal with a flat gasket—reuse your stock donut gasket along with the included 2x thick GrimmSpeed 3" gasket for a flawless, leak-free installation on the first try.