BRAND NEW PART NUMBER: 330-0017 S&S Cycle 509G Gear Drive Camshaft Kit FITS 1999-2006 (EXCEPT 2006 DYNA) BIG TWIN MODELSThe 509 Touring Cam is designed as a bolt-in, high torque cam for 1999- 06 models, except 2006 Dyna. 180 psi cranking compression, no need for compression releases. For 88 CID engines with stock compression ratio. Idle-4500 rpm. With the current popularity of baggers, it s no surprise that the S&S 551 cams for Harley-Davidson touring bikes have become a favorite with late model bagger riders. The only problem is that, due to the .550″ lift, the 551 cams can t be installed in early (1999- 04) Twin Cam 88 engines without also installing a set of high lift valve springs. That means that the heads would have to come off just to install a cam. That s a lot of work and added expense! Based on the success of the 551 cams, S&S has come up with new 509 bolt-in torque cams that work with stock valve springs in 1999- 04 engines. Like the S&S 551 cams, the new 509 cams are great for low and midrange torque, but the 509 cam s lower lift allows them to be bolted into stock 1999- 04 engines with stock valve springs. That saves a lot of time and money on the installation, which makes the S&S 509 a lot more attractive to owners of older Twin Cam 88 powered bikes. Of course, the 509 cam also works great in 2005- 06 88″ engines, except 2006 Dyna models. CAM SPECS: Intake Opening (degrees): 18 Intake Closing (degrees): 18 Exhaust Opening (degrees): 46 Exhaust Closing (degrees): 11 Intake Duration (degrees): 216 Exhaust Duration (degrees): 237 Valve Lift (in): .509 Intake Lift at TDC (in): .174 Exhaust Lift at TDC (in): .140