Full System - Front Mounts on 1997 Mercruiser, GM 7.4L/8.2L 454/502 MPI Multi Port Fuel Injected engines w/ center discharge exhaust, and V-BELTS. This kit works on Bravo and straight inboard applications, WILL NOT work on V-Drive applications. This system cools and protects both the engine block and exhaust manifolds. Magnum engines require additonal MC330MAGKIT to be ordered ($20). Cools and protects both the engine block and exhaust manifolds. If engine is equipped with 3" or 6" spacer blocks between exhaust manifolds and riser, the appropriate ADDITIONAL Mercruiser Riser Extension Kit must be ordered. Kit comes complete with detailed installation instructions.