Chain drive, .574\" int., .574\" exh. Replacement cams for use in combination with the stock hydraulic chain tensioner system. Compatible with stock length pushrods. Bolt-in for 96/103/110\". All-round performance cam with smooth cam lobes, performance pushrods & lifters recommended but not required. 99-04 TC 88/95 require high lift valve springs. Responds well to head modifications & higher compression ratios.