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Super heavy duty .165" wall thickness rocker shafts that are INCLUDED with (and developed specifically for) our roller rocker arms. Thinwall, light duty rocker shafts supplied with "the competitions" roller rocker sets are shown on the left for comparison. In addition to the much heavier wall thickness, our HD shafts are made from solid 4340 steel. This helps the shafts to maintain perfect roundness under extreme loads, and allows the holddowns to be tightened to the proper torque without distorting or "ovaling," which is a common problem with the thinner shafts. We sell these heavy duty shafts separately as a service replacement part for our rockers, or as an upgrade for use with other companies rocker arms. Diameter is the same a standard factory shaft.
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