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The Borla S‑Type XR‑1 Cat‑Back Exhaust is a direct bolt‑on system for 2002–2007 Subaru Impreza WRX (2.0L/2.5L) and 2004–2007 WRX STI models, engineered for increased exhaust flow and a more aggressive tone. It uses 3" tubing, an XR‑1 multi‑core muffler and a polished T‑304 stainless tip, and applies Borla's race‑derived design and balancing to aid flow, sound and long-term durability; backed by Borla's written warranty.
Borla 04-07 STi XR-1 Cat-Back Exhaust
