S&S Cycle 99-06 BT 509C Chain Drive Camshaft KitThe 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. S&S 551 cams for Harley Davidson touring bikes have become a favorite with late model bagger riders. The problem is that, due to the . 550" lift, the 551 cams can't be installed in early (1999 '04) Twin Cam 88 engines
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