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