H.S.I. Inline Water Restrictor

3/8" Inline Water Restrictor. This restrictor may look simple, but there’s no stealthier way to dry out your pipe & wake up your exhaust. Simply install the restrictor inside of your 3/8” cooling line with a main jet size of your choice. The restrictor is designed to accept Mikuni main jets (N102.221-SIZE) to control the flow of water. This small restrictor is ideal for exhaust stingers and it works great paired with a flow control valve. Unlike the flow control valve, this will restrict the water flow at ALL times, helping the ski run consistent and more crisp.  *Mikuni main jet not included *It is NOT recommended to go below a 150 main jet size Part Number: HSI-70-0004