The 509 Touring Cam is designed as a bolt-in, high torque cam for 1999-'06 models, except 2006 HD® Dyna®. 180 psi cranking compression, no need for compression releases. For 88 CID engines with stock compression ratio. Idle-4500 rpm. The S&S 551 cams...

The 510G is designed as a bolt in cam for 88 to 95 inch engines with compression ratios below 9.7:1. Intended primarily for stock heads that have not been ported. Can be used with stock springs. Includes 510G gear drive camshaft set and inner gears,...

S&S Cycle .7874in x 1.6535in x .4724in Camshaft Outer Ball Bearing