Subaru WRX / STI Cat-Back Quad Tip Exhaust System from Turbo XSUnleash an aggressive and throaty exhaust note for your Subaru WRX / STI with the Turbo XS Cat-Back Quad Tip Exhaust System! This System is designed using thick walled 3" OD Stainless Steel tubing for maximum durability and features quad 4" OD Stainless Steel "Blued" Tips! This exhaust system by Turbo XS has a true full 3" diameter straight through design giving that deep throaty sound that everyone loves. All gaskets and hardware are included giving you everything you need for a quick installation.Turbo XS Subaru WRX / STI Cat-Back Quad Tip Exhaust System Features:Direct Bolt-On to OEM Downpipe3" OD Stainless Steel Tubing4" OD Stainless Steel "Blued" Tips All hardware and gaskets included