Our high performance cams are added to rapidly increase horsepower and torque

When using with stock compression pistons

you must remove your ECU and mail it to our Bikeman facility for the Dynojet Bench Flash Unlock service prior to tuning

True Full Exhaust System: Replaces the restrictive factory one-piece setup with a completely redesigned high-flow header and matching dual-tip exhaust

Our silicone charge tube has many key benefits

Arctic Cat 858 High Elevation Head Mod 04-411 Category_Default Category/SLED/Polaris/IQ 700 Our high performance cams areTHIS HEAD MOD REQUIRES YOU TO SEND IN YOUR STOCK HEAD FOR EXCHANGE Need more power out of your 858 at high elevation Our head mod packs some serious power, No tuning required Pump gas friendly Arm Pulling Torque