S&S CYCLE 551 Easy Start Camshaft Kit

S&S CYCLE 551 Easy Start Camshaft Kit (Gear Drive) – Twin Cam ’07–’17 The S&S CYCLE 551 Easy Start Camshaft Kit is engineered to make starting easier while preserving normal running performance. It uses a centrifugal compression release system that reduces crank compression for initial starts, then retracts as RPM increases so the engine delivers full compression without performance loss. Key Benefits Easy Start compression release for easier cranking Returns to full compression after the engine is running Strong low-end and midrange torque (strongest from idle to 4000 rpm ) Optimized for 88"/96"/103" to 106" Touring bikes with slip-on mufflers Works well with 9.0:1 to 9.0:9 compression and a stock starter Bolt-in for stock or mildly modified Touring models Includes Camshafts, gearcover gasket, bearings, retaining ring, o-ring, thread lock, and instructions Made in the USA Fitment & Important Notes Not recommended for compression ratios of 10.0:1 or greater Installer must check coil bind , valve-to-valve clearance, and valve-to-piston clearance Not for models with OEM compression releases Can be used with stock pushrods, lifters, and springs (unless noted) Specifications: Gear type kit, Street riding style. Weight: 5.88 lbs  |  Dimensions: 11.61" x 9.25" x 4.84"