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The Invidia adapter converts a Subaru stock downpipe flange to accept a 3" cat-back connection. It’s a simple joining piece intended to bridge factory downpipes and larger-diameter exhaust systems, letting you integrate a 3" cat-back without modifying the downpipe flange itself and preserving exhaust routing for a cleaner installation.
Invidia Subaru Stock Downpipe to 3in Catback Adapter
