Calibrated for street high performance . Check out these features: .113 primary jets, .075 x .047 metering rods, .101 secondary jets, 350-1478 choke kit is applicable. Out performs the competition by 26 ft/lbs. of torque and 22 HP on a Small Block Chevy. Comes well equipped with a high-capacity accelerator pump and high-lift boosters. Edelbrock Performer EPS 800 Carbs are dependable and easy to tune, just like other Edelbrock carbs. Easy to adjust, out-of-the-box performance with no ''failure-prone'' power valves.