Chain drive; .525″ int.; .535″ exh. Replacement cams for use in combination with the stock hydraulic chain tensioner system. Compatible with stock length pushrods. Bolt-in. Great workhorse for stock 88/96 and mild 103″ strokers with stock springs; pushrods etc. Smooth cam lobes for less wear and tear on the; quiet; valve train components; increased fuel economy and torque. Responds well to head work and compression increase. Linear power band 1750-5500 RPM.