Polaris 3900 Sport Chain Tensioner Kit | 39-120 Paramount Retro Ensures precise valve actuation for

Ensures precise valve actuation for optimal water distribution

Built as an upgrade to the original Style 2 heads

This diaphragm is shaped like a tube or a pipe and is tan in color

Making it an exact replica and a trusted OEM product

Included components such as the impeller

Polaris 3900 Sport Chain Tensioner Kit | 39-120 Paramount Retro Ensures precise valve actuation forPolaris 3900 Sport Chain Tensioner Kit (39 120) The chain tensioner kit was designed by Polaris for the 3900 Sport pressure side cleaner. It is made from the same high quality material as the original factory part. Making it a genuine OEM product. These parts were designed to aid in the maneuverability of the 3900 Sport and its purpose is to apply force or maintain tension for the chain. This is important because the chain is what rotates the wheel