Edelbrock 1413 EPS 800 Square-Bore Electric Choke Designed and calibrated for serious street high-performance engines Metering rods can be changed within seconds without carburetor removal No plastic parts to break and no power valves to blow out Features a high capacity accelerator pump and an improved primary and secondary cluster design Comes with 113 primary metering jets, 101 secondary metering jets and 0.071 x 0.047 metering rods