This is a pair of New Old Stock aluminum log style intake manifolds made by Traco Engineering. These manifolds fit Buick 215 engines and I believe they may also fit Oldsmobile and Land Rover 215 engines as well. Traco was well known for making parts for factory race teams and these parts were no generally available to the public. These recently came out of the estate of a long time racer. I believe these were used on British Leyland racing projects of the 1960's as well as Chaparral cars and even at least one Formula 1 car. They were likely used on other race cars as well. These are made to accept Weber carbs like the 48 IDA. These manifolds may also accept some vintage fuel injection manifold. Please confirm your specific application.