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43/64" bit is correct for drilling hubs or axle flanges to accept most 5/8" wheel studs with
Spread port heads have the center exhaust ports spread apart 5/8'' over stock L98 GM heads
11/16 in 36 Spline
It is designed for wet sump systems where a remote filter is desired
COMP Cams 1.437" O.D. Spring Shim Kit 723003 43/64" bit is correct forThis shim kit contains . 015", . 030" and . 060" thick Valve Spring Shims with 1. 437" outside diameter and . 645" inside diameter are used to equalize the installed height of valve springs. Made from the highest quality shim stock, these shims are heat treated to stand up to radical cam lobes. This COMP shim kit includes a number of 1. 437" diameter shims of various thickness. This kit includes 16 . 015" thick shims, 16 . 030" thick shims and 16 .
