JIM S CHROME TAPPET BLOCKS MADE FROM 7075-T651 BILLET ALUMINUM AND CHROME PLATED. FITS ALL EVOLUTION BIG TWINS 1984 TO PRESENT
Source: Custom Chrome
Polished billet tappet blocks are precision-machined 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.