Arctic Cat 900+cc engine 800 bigbore, dyno tested five times

we compare the Catalyst 858 torque and HP curve to the 850 Polaris and 850 SkiDoo

compare well broken in demo sled with Billy Howards 50 mile production sled

Stock engine stock pipe, SSI pipemod, D&D, SW, BMP, Jaws and higher HP AA ported w Jaws pipe