Tomei Expreme Ti Exhaust - Mitsubishi EVO 8, 9 (for use with JDM Rear Bumper)The exhaust flow design was the main focus in the pipe design, the best pipe thickness for weight and strength with pipe diameter to suit torque and all power gains throughout the entire power band. RACING LAYOUT: For the best exhaust efficiency results minimal bends and curves was the design focus points on this product which aided with the supreme results. 3 PIECE ASSEMBLY: No flanges were fitted for increased weight savings and for a better finish