The ventilation system is based on the use of point perforation in strictly defined zones

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What makes the pro version special

12 Point Socket's Manufactured From Chrome Vanadium Steel Hardered and Tempered with a Satin Finish Each Socket has a knurled ring for extra grip

'06 Dyna Glide and All '07 -'18 Big Twin (Except '16 -'18 Dressers

RK CHAIN RK520ZXW 112R 520ZXW-112-CLF polaris-sportsman-800-forest-800-2014-esi4002154 The ventilation system is basedDeveloped to meet the spec of the latest models of extreme superbike., Features RKs only technology of XW Ring., 2 lubrication pools and 3 contact lips., Triple barrier structure to further seal the lubrication and prevent debris to enter the chain., Designed to be the strongest, long lasting chain available on todays market., Highest tensile strength of all RK series and high rigidity for instant respond on acceleration.