HARLEY Sifton 45 inch WR Cam Set Fits 1937-1973 G, 1937-1952 W,

Sifton 4 piece 45 inch WR cam set for use with bushings features the original design lobes by Tom Sifton in the late 1940's. For use with roller tappets. *NOTE: The intake opens at 45� Before Top Dead Center .010 lift. The exhaust opens at 40� After Top Dead Center .010 lift. **NOTE: V-Twin purchased the Sifton company in the year 1998. FITS HARLEY: 1937-1973 G, 1937-1952 W,