The Speed Demon series is the most formidable performance street carburetor available today. It features the most advanced design manufacturing processed that provides street enthusiasts with racing carburetor technology in a very driveable package. The Speed Demon line offers a wide range of sizes and in VE Series or twin squirter designs. Across the range of sizes from 575 cfm to 850 cfm the Speed Demons deliver balanced/high velocity airflow/exceptional fuel metering capacity to match the fuel requirements of most street engines. A Speed Demon carburetor is ideal for muscle cars/stock rebuilds/tow trucks/mild performance applications/crate motors. They are designed for engines with cam profiles between 220 and 240 degrees duration at 0.050 in.