SPT 2008+ STI Cat-Back Exhaust   E-mail this product to a friend In Stock and Ready To Ship! Subaru of America is pleased to announce the release of the 2008 - 2010 Impreza STi 5-door Subaru Performance Tuning Cat-Back Exhaust System. The new three-inch stainless steel exhaust system replaces the stock STI center pipe and rear muffler assembly, and features smooth mandrel bends for low restriction, a better-sounding exhaust note, plus up to a 10 horsepower increase! The Impreza STI SPT Cat-Back Exhaust System is covered by the 3-Year, 36,000 mile Genuine Subaru Accessory Parts Warranty. Give your STI an aggressive look and sound to match its outstanding performance! The Subaru Part # for this exhaust is D441SFG200 Regular Price: $999.99  On Sale For: $937.99  SKU: D441SFG200 (1725) Dimensions: 69.0 x 25.0 x 13.0 Weight: 65.00 Quantity: