Andrews 216821 – 21N Twin Cam 88 Conversion Cams Kit Upgrade 99-06 Roller Chain. This product data sheet is originally written in English. Andrews Roller Chain Conversion Camshafts. Allows upgrade of the’99-’06 Twin Cam (except’06 Dyna Glide) to the newer roller-style cam chains and replaces the spring tension cam chain adjusters with the later-style hydraulic adjusters for longer life. A list of required components is supplied with each set of cams. Performance should be similar to earlier bikes with the same cam grinds. Made in the USA. Note:’99-’06 Twin Cam motors (except’06 Dyna Glide) cannot use the’07-’17 cams, as the bearing journal on the earlier motors is. 875″ in diameter and the’07-’17 cams are 1.000″ in diameter. The “N” series of cams feature the. 875 bearing journal, yet still accept the new style cam support plate. Note:’99-’01 model motors require Andrews rear cam sprocket. 02-’06 models must use the stock rear cam sprocket, OEM #25728-06. Note: Installer must check coil bind, valve-to-valve clearance and valve-to-piston clearance. Local pickups are welcome! We must be notified within 24 hours of receipt of any missing, defective or damaged goods. Any item which has been used, worn, damaged or had tags/labels removed will not be eligible for return. Any damage claims may be exchanged for the identical item only.