- Direct upgraded replacement for the stock inner (secondary) & outer (primary) hydraulic cam chain tensioners - Housings are precision machined from billet 6061 aluminum - Tensioner pads are injection molded nylon with PTFE added for less friction and better endurance for extended service intervals - Single piston; designed to duplicate the tension of the OEM parts - Includes ARP 12-point chrome moly installation hardware - These tensioners will fit Feuling; OEM and SE 07-17 Twin Cam cam plates and the conversion cam plates; designed to run the early 99-06 camshafts. - For replacement parts see: 948490 inner chain tensioner only; 948489 outer chain tensioner only; 948492 2-pk tensioner pads; 948493 6-pk tensioner pads.