Ultra ARC Aluminum Narrow Body - 3/8 Polylock. The Comp Cams Ultra ARC Aluminum Series Rocker Arms increase engine power improve valvetrain stability and enhance oiling efficiency. Their extruded designdeveloped using FEA analysiscreates a stronger stiffer rocker body without adding unnecessary weight. The ARC series rocker arms feature an Arced Recessed Contoured design delivers an optimal strength-to-weight ratio. Backed by a Lifetime Warrantybuy them once and use them forever. Engineered for applications running up to 700 lbs of open spring pressure.
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