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Cam Chest / Valve Train

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  1. Be the first to review this product

    As low as: $5.85

    Use sprocket spacers to align the primary cam sprocket with the pinion shaft sprocket when installing new cams in a Twin Cam®.
  2. Be the first to review this product

    As low as: $6.15

    JIMS® rocker arm shafts are perfect for rebuilds or new construction, precision-ground right here in the USA. A special model for EV and Twin Cam® racing engines is available that is drilled and tapped on one end for grease fittings, designed to be used on engines that run “dry” top ends (no oil feed to the rocker arms). Sold each.
  3. Be the first to review this product

    As low as: $6.25

    The Twin Cam® engine features an oil pressure bypass passage within the cam support plate that is controlled by a spring-loaded plunger. The purpose of this passage is to allow excess oil pressure to be diverted back to the feed section of the oil system.
  4. Be the first to review this product

    As low as: $7.49

    JIMS® Roller Rocker arms are made from aerospace quality 4340 chrome moly steel, CNC machined and specially heat treated for durability. Critical areas of the arm are strengthened and material is removed where not needed for lighter weight. A roller tip made from bearing grade steel is incorporated to reduce valve and guide wear and 660 bronze bushings are used for stability, longevity and strength. Available for EV and Twin Cam® engines in stock 1.625:1, or higher 1.745:1 ratio for additional lift at the valve (modifications required). Shovel arms are 1.5:1 ratio. Uses stock or JIMS replacement rocker shafts (not included).
  5. Be the first to review this product

    As low as: $7.50

    Got those loose rocker tickin’ blues? Tighten them up a bit with these shims. Factory clearance spec is .003”-.013” for end play; setting them up to the tighter side of the spec can reduce noise. Shims should be installed on the non-thrust side of the arm (left side on intake, right side on exhaust).
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