This is the 4"long battery cable heat shield that attaches to the driver's side heat bolt and run down between #5 and #7 exhaust ports. We also have the 4-1/2" long shield avaiable in the shopping cart. These cannot be used with HO or RA exhaust manifolds. These are used from 1964-1977. These also fit a variety of V-8 full size cars before 1964.