Die Cast Rocker Cover for 1984-'16 HD<sup>®</sup> Big Twins and S&S<sup>®</sup> 4-1/8"

Die Cast Rocker Cover for 1984-'16 HD® Big Twins and S&S® 4-1/8"

Item #: 90-4110
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$649.95
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S&S® die-cast rocker cover kit & replacement gasket kit. For 1986-'16 HD® big twins and S&S® 4-1/8" Kit contains 2 covers and all necessary gaskets, o-rings, and mounting hardware.

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In spite of the similarities between different S&S billet and cast rocker covers, not all parts are interchangeable. See page 3-78 & 3-79 for correct part numbers. The performance-oriented design of the billet rocker boxes permits valve lifts up to .710" with stock or S&S Super Stock® heads, and up to .810" with S&S Special Application heads. S&S roller rocker arms are recommended for high lift cams. Cast rocker boxes may require some minor clearancing, and it is recommended that they be ordered either polished or unfinished, so that clearancing may be done without disturbing chrome plated surfaces. S&S billet rocker covers accept valve springs up to 1.660" O.D. without modification. Cast rocker boxes may require minor clearancing. Cylinder heads must be set up correctly for high-lift cams, and it remains the builder’s responsibility to confirm all clearances. Kits include front and rear cover assemblies with base and top cover, rocker shaft supports, gaskets and o-rings, and instructions.