600 CFM - 4160 - Vacuum Secondaries - Shiny - Gasoline Vibratory polished aluminum for good looks, weight savings and long lasting shine Performance upgrade for stock to mildly modified vehicles Universal calibration for easy bolt-on performance Factory preset electric choke for easy startups Vacuum secondaries for use on wide variety of vehicles. Compensate for all vehicle weights, gearing & transmissions to allow smooth opening of secondaries. Dual feed fuel inlets for constant high volume fuel delivery Compatible with GM, Chrysler, and Ford A/T kickdown linkage. Additional parts may be required. Power valve blow-out protection Clear fuel level sight glasses...