The Straightline Performance Polished Ceramic Y-Pipe Manifold for the Arctic Cat Catalyst 858 delivers a proven 2 horsepower gain and improved mid-range torque by increasing exhaust flow efficiency. Featuring a premium polished ceramic finish, reduced under-hood temperatures, direct bolt-on installation, and no required fuel or clutching changes when installed alone, this manifold is one of the easiest and most effective performance upgrades available for the Catalyst 858 platform.