Manufactured from the highest quality aluminum, the Russell Engine Lift Plates’ unique one-piece construction ensures years of worry-free service. They’re designed to work with most 2-barrel and 4-barrel intake manifolds. Their thick 5/16 in. construction is rated at 1,000 lbs. and features large lift ring holes. The plates come complete with hardware for attachment to the manifold, but are not recommended for use with aluminum intake manifolds.