DescriptionThis kit contains special upper and lower cam drive sprockets, camshaft adaptors, Minus the Chain,  Another benefit of this roller chain setup is that now a longer cam chain is also available for racers using the longer stroker crankshafts with tall stroker plates. See below for Chain  Part NumbersThese kits require modifications to the oem front, back, and top chain guide. E-mail APE at [email protected] for more information.CHAIN OPTIONS(114 links)   Part# BF05MUx114 – $249.95(116 links) Part# BF05MUx116 – $249.95   IDEAL FOR STROKER ENGINES