1 XAA5052 Aluminum Shroud. For Chevrolet,Impala,Bel Air,Brookwood 1969-1970. For Chevrolet Caprice Kingswood,Biscayne,1969-1970. The fan shroud basically houses the fan blades securing it in place and keeping it from damaging the other engine components that may disturb the smooth and even operation of the engine.