This Straightline Performance Y-pipe manifold is a direct bolt-on upgrade for the Arctic Cat Catalyst 858, M 858, Riot 858, and ZR 858 snowmobiles. It delivers a proven 2 horsepower gain and stronger mid-range torque, so you get sharper throttle response and quicker acceleration where you actually ride.

The polished ceramic coating manages heat to reduce under-hood temperatures and resists corrosion, while the manifold installs as a direct replacement with no fuel, clutching, or calibration changes required when used on its own. It works with stock or modified machines and includes installation instructions.