S&S 640GPE Gear Pump Easy Start Cams greatly improves valve timing accuracy by eliminating timing chain lash and allow stock starter to start any engine, and there are no tensioner shoes to wear out or fail. The 640 cam is designed for engines of 95 inch or more with compression ratios between 10.5:1 and 11.5:1 used in S&S 124 inch engines.
Kit includes camshaft set with inner gears. Fits 1999-2006 Harley-Davidson® big twins (except '06 Dyna®).
Note: These cams are not bolt in and will need special valve springs.
