The Borla(r) Axle-Back system for the fifth generation Forester is tailored specifically for the 2.5L Boxer engine. It provides a more aggressive sound over the stock system without adding any drone. The 11966 weighs less than the factory system, and features a 3.5" black coated T-304 stainless steel tip. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. System bolts directly to the O.E. mounting points for ease of installation. A polished tip is also available on system 11966., System Features:, Axle-Back System, 3.5" Black Coated T-304 Stainless Steel Tip, S-Type Sound Level, No-Drone, T-304 Stainless Steel Construction, Bolt-On Installation, Million Mile Warranty, Each Borla(r) Exhaust System is built from Premium T-304 Stainless Steel to give you the absolute Best in Performance and durability.