9.52 9 JIMS Billet Tappet Blocks Polished billet tappet blocks are precisionmachined from 7075-T651 aluminum. Tappet bores are held to centerline tolerance of .002" and are perpendicular to the mounting flange to within .0002". They will accommodate a cam with .550" gross lift (.350" at the tappets), and may be easily modified for higher lift cams. Sold in pairs. For Panheads and Shovelheads from 53-84 Replace OEMs 18602-80A and 18603-80A. 20605 Polished tappet blocks ONLY Note: It is recommended that you use OEM 18522-53 tappets (or equivalent) with CC #20605. JIMS Big Axle Powerglide Polished Billet Aluminum Tappet Block Kit Panhead or Shovelhead engines can now have all the benefits of the hydraulic tappets fitted to Evolution engines eliminating the total oil loss of the stock hydraulic units. Made of 7075-T651 aluminum rated at 83,000 psi, twice as strong 6061-T6 aluminum. Capable of the highest rpm's engines can safely turn, at a valve lift of .700". Machined to the center line of the cam and held to a tolerance of ±.002". Bores are held ±.0002" perpendicular to the mounting flange. Includes front and rear tappet blocks, 4 Big Axle Power glide tappets, tappet block gaskets and instructions. 20839 Fits Panhead and Shovelhead engines from 53-84 Tappet Block Screws (sets of 8) 93148 1/4"-24 12 6-point countersunk heads for Big Twins from 53-E76 93149 1/4"-20 12-point heads for Big Twins from late 76-99 (except 99 Twin Cam)M20839 Chrome Tappet Block Set for Evolution Big Twin Models Chrome-plated, aluminum tappet blocks for all Evolution Big Twin models 84-99. Includes eight chrome sockethead screws. 658161 Offset Evo front & rear tappet block set. For Evo engine cases with 1/4” offset cam cavity (Revtech Gen 3 & Gen 4 cases and other aftermarket off set cam cavity cases) U.S. Des. Pat. #344,274 Chrome Lifter Blocks for Big Twins Chrome lifter block set for Pan head and Shovel-head Big Twins from 53-84. Complete with two sets of chrome-plated sockethead capscrews, 1/4"-20 for models from late 76-84 and 1/4"-24 for 53-E76 models. 26170 Complete set of lifter blocks and screws 25118 1/4"-24 socketheads for Big Twins from 53-E76 (set of 8) 25119 1/4"-20 socketheads for Big Twins from late 76-E84 (set of 8) Tappet Blocks for Early Big Twins These late style tappet blocks fit Big Twin models from 53-E84. When fitted to 53E76 models with stock 1/4"-24 tapered screws, a conversion tappet block screw set is required. Screws sold separately. Available with black or chrome finish. Will also fit models from 48-53 without hydraulic lifters. Sold in pairs. Note: Tappet blocks do not have vent fitting found on some 81-82 models. 020020 Black Tappet Guide for Sportster Models Aluminum guide for all models 57-85. Sold each. 20009 Replaces OEM 18607-57 Chrome Tappet Block Cover Sets for Evolution Big Twin Models These unique covers are available in stamped steel that fit over the Original Equipment tappet blocks like a second layer of skin, maintaining the stock appearance. Each cover has a hidden slot in the back permitting it to be installed without removing your pushrods. Just lift the pushrod tube covers and slip them on. They’re held in place with silicone adhesive which is provided. Four 12-point chrome screws are included to replace the four zinc-plated Original Equipment screws which protrude slightly thru the holes in the fronts of the covers. Fits all Evolution Big Twin models from 84-99 26171 Chrome tappet block cover Tappet Block Covers for Evolution These die-cast tappet block covers have been re-designed to completely cover the original block mounting bolts for a custom look. Installation is easy with supplied silicone adhesive and does not require tappet block removal. Fits Evolution Big Twin models from 84-99. 020028 Tappet block covers
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