BRAND NEW PART# 106-5233 Fits 06-17 Big Twin models Chain drive Optiomized for 95″ to 106″ with slip-on mufflers, high-flow air filter and 9.0 to 10.5:1 compression. Great results from 3000-6000 RPM. 99-04 models require high-lift springs and adjustable pushrods. Start any engine regardless of displacement or compression ratio with a stock starter Save your starter and battery; tested for 10,000 starts without running battery down Allow for easy start by initially reducing crank compression, but once the engine starts and rpm increases, the compression release lobe is centrifugally retracted and the engine runs normally, with full compression, and without any loss in performance All chain-drive cams include installation kit All gear-drive cams include 4-gear set and installation kit For 88/95/96/103 cubic-inch engines Compression ratios below 10:1 Installer must check coil bind, valve-to-valve clearance and valve-to-piston clearance. Due to the inherent characteristics of gear drives, you may experience more valve train noise. Not for models with OEM compression releases. Made in the U.S.A. GRIND – 585 SERIES INTAKE LIFT AT TDC – 0.186″ INTAKE OPEN – 20 INTAKE LOBE CENTERLINE – 102.5 INTAKE CLOSE – 45 INTAKE LIFT – 0.585″ INTAKE DURATION – 245 EXHAUST LIFT – 0.585″ EXHAUST DURATION – 260 EXHAUST LIFT AT TDC – 0.179″ EXHAUST OPEN – 60 EXHAUST LOBE CENTERLINE – 110 EXHAUST CLOSE – 20