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. Camshaft upgrade for all 99-06 engines.. Installing 2007 roller cam chains on earlier engines requires series “N” Andrews camshafts, Stock H-D parts are required: 2007 cam support plate, 2007 or later oil pump, cam sprockets and chains and both hydraulic chain adjusters. EZ-install pushrods do not require removal of gas tanks or rocker boxes when installing bolt-in camshafts.. 12N: Bolt-in cams for 99-06 engines; Similar cam time to stock 88 engines for cooler running and more power.. 21N: Bolt-in cam more torque for all around riding with heavy bikes, stock compression ratios and stock pistons; Similar to #23 cam for EV80. 48N: Broad tip cams for baggers with stock motors; Max torque at low and mid RPMs; High lift springs needed for 99-04 engines.. 50N: Designed for easy installation in 95 motors with stock heads and 9.5 to 9.8 CR. Added to the conversion cam group by popular demand.. 55N: Great cam for 95 with 9.8 to 10.2 C. Max HP – torque at mid and upper RPMs (2600 to 6200).. 67N: Performance cams for 95″-107″ + 10.0 to 10.8 CR with high-flow head setup. (2600 to 6400+ rpm). Eliminate spring powered chain adjusters. Engines converted to 2007 type cams and chain drives will have higher output due to less power loss from older spring powered chain tensioners; instead, of the original spring adjusters, new roller cam chains use engine oil pressure to maintain proper chain tension. Camshafts on all 99-06 Twin Cam 88 engines exc. 2006 Dyna can be updated to new style roller chain drives. Designed for use with stock H-D hydraulic lifters. 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. 26N: Bolt-in cam 88″-95″ and stock compression ratio; Great for two up touring, this cam wil.