For 95/96/103 and 110 cubic inch engines with compression ratios from 10.0 to 10.75:1. Strongest from 3000-6000 rpm. Increase valve timing accuracy by eliminating timing chain lash and loosely-fit stock chain drive. Reverses the rear cam's direction of rotation, providing additional operating clearance between cam lobes, as a result, higher cam lifts are possible. Material must be removed from inner surface of the stock gear cover to install. A hydraulic press and other professional level tools are required to install the kit. High lift valve springs and adjustable pushrods required. Camshaft bearings and gaskets must be replaced when installing new camshafts. Kit includes camshafts, inner gear, outer drive gears, inner, outer bearings, gasket and instructions. Made in the USA. Installer must check coil bind, valve to valve clearance and valve to piston clearance.. Due to inherent characteristics of gear drives, you may experience more valve train noise..