Replacement Billet Head Domes for Polaris (800 / 850 / 900) Category_Default Category/SLED/Polaris/AXYS 850/ Clutching You can easily convert this

You can easily convert this recirculating valve into an atmospheric blow-off valve using our Vent to Atmosphere (VTA) Conversion Kit

for an exact fit to your machine

No fuel changes normally required

This is a one-time added cost that enables all future flashing

Replacement Billet Head Domes for Polaris (800 / 850 / 900) Category_Default Category/SLED/Polaris/AXYS 850/ Clutching You can easily convert thisReplacement Billet Head Domes for Polaris (800 850 900) Tune your engine's compression ratio for optimal horsepower and elevation with Bikeman Performance Replacement Billet Head Domes for Polaris snowmobiles. Designed to fit seamlessly into Bikeman Modular Billet Head shells, these interchangeable domes allow you to quickly alter combustion chamber volume to suit changing mountain elevations, high octane race fuels, or low elevation pump gas setups