Like 'larryblack' said it's just a cast iron Q-Jet intake, the parts catalog listed anything with a 4 Bbl. and dual exhaust as "Special High Perf." back then. They all had that crossover passage under the front so they required a gasket set with a stainless steel shim. Don't throw it away, it's better than a 2 bbl. but nothing "special".zipfactor said:the intake looks like a stock intake from a 350 sbc, except the mounting base on the carb has this area that is a indented curve on the front of the mounting base. I had to get a special gasket for it from the parts store, and its listed in the catalouge as a special high performance intake. Its not a 2X4 cross ram intake.