Pro-X 28.SIS4406-2 Steel Intake Valve and Spring Kit riding-apparel-jerseys-bicycle-e-power Speedometer Speed

Speedometer Speed

2002-2006 Ski-Doo MX Z 600 Renegade

On the fly external adjustment

1986-1990 Harley Davidson FXRT Sport Glide

Pro-X 28.SIS4406-2 Steel Intake Valve and Spring Kit riding-apparel-jerseys-bicycle-e-power Speedometer SpeedMaterial: Steel Replaces the OEM valves & valve springs. Steel, nitrided valves for increased durability and less wear under extreme conditions. Stronger valve springs deal with the extra weight of the steel valves. Springs are made from premium chrome vanadium steel for higher performance and durability at high rpm. Kit contains a set of steel intake or exhaust valves plus a set of specially designed valve springs; can be installed using the OEM