Mitsubishi EVO X SS 3" Quad-Tip Cat-Back ExhaustMFG# 552101 DESCRIPTION Significant attention was devoted to the packaging of this exhaust. Tubing diameter was increased to 3" and bends were kept to a minimum with large radii for optimum flow characteristics. Fitment was extensively worked to ensure maximum ground clearance to accommodate cars with very low ride heights. Designed as a direct replacement for the factory cat back exhaust, it uses all of the stock mounting points and is compatible