Andrews 216821 - 21N Twin Cam 88 Conversion Cams Kit Upgrade 99-06 Roller Chain

Designer: Andrews

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SKU 216821
Free delivery to the Lower 48 States
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PART# 216821 OR 494071

Andrews 216821 - 21N Twin 88 Conversion cams - 99-06 Twin Cam (except 06 Dyna)


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 1999-2006 Twin Cam 88 engines (excludes 2006 Dyna) can be updated to new style roller chain drives

Designed for use with stock Harley Davidson hydraulic lifters

Installing 2007 roller cam chains on earlier engines requires series “N” Andrews camshafts. Stock Harley Davidson parts are required: 2007 cam support plate, 2007 or later oil pump, cam sprockets and chains and both hydraulic chain adjusters

Matching EZ-install pushrods kits are sold separately. EZ-install pushrods do not require removal of gas tanks or rocker boxes when installing bolt-in camshafts

Cam style: 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 (1700-4800 RPM)

Specification readings are as follows, with Timing and Duration measured at .053 cam lift. 

Intake Timing Open (in degrees): 10

Intake Timing Closed (in degrees): 30

Intake Valve Duration (in degrees): 220

Intake Lift: .498

Exhaust Timing Open (in degrees): 40

Exhaust Timing Closed (in degrees): 08

Exhaust Valve Duration (in degrees): 228

Exhaust Lift: .498


Fits the following Harley Davidson models:

All TWIN CAM models 1999-2006 (excludes 06 FXD)