This system produced gains of up to +13 HP and +14 lbs. x Ft. TQ., as measured on our in-house dyno. This axle-back exhaust system is constructed of 2-1/2 IN mandrel-bent 304 stainless steel tubing for maximum strength and durability. This system features dual high-flow 304 stainless steel mufflers, producing a smooth sound. Finishing off this exhaust system are dual 4-1/2 IN diameter carbon fiber 304 stainless steel clamp-on exhaust tips. The tips features an aFe POWER logo for a unique style. This system produces a smooth sound unleashing all available horsepower and torque. Utilizing factory style flanges and hangers this system is a direct bolt-on system, which requires no cutting or modifications for a hassle-free installation. State-of-the-art computer-aided design technology is utilized for precise vehicle fitment. 100% MIG-Welded for race-proven strength and durability. Takeda 2-1/2 IN 304 Stainless Steel Axle-Back Exhaust System w/ Carbon Fiber Lexus IS350 14-23 V6-3.5L Lexus IS350 14-23 V6-3.5L