SBT Head Stretch Bolt Set Fits All 4 Stroke Engines (Sea-Doo)

Fits: 420641110290641110Kit contains 8 piecesTorx Flanged Screw M11 x 147New stretch bolts should be used to prevent both torque loss and possible engine failure when rebuilding an engine.Measuring the old bolts will not indicate how much strength has been lost during the engines heat cycle.