REMARK Catback Exhaust. Subaru WRX VB 2022+. R1 Spec Single-Exit StainlessSingle Exit Catback Exhaust System for Subaru WRX VB 2022+. Designed and manufactured for the performance minded enthusiasts. The R1 Spec features 3" mandrel bent piping, and high flow straight through muffler design. The piping layout favors optimal flow path to reduce the amount of restriction. This is a no frills cat back system for those who want a high flow, high quality, light weight exhaust system. Stainless Steel versus Titanium muffler
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