Performer Series Square bore carburetors are designed to provide the widest possible torque range when used with stock or performance cam and intake combinations. Designed and calibrated for small cubic-inch engines and dual-quad applications. Performer carbs utilize a two piece construction of lightweight ball burnished aluminum which resists warping and leaks. There are no power valves or plastic parts used on these carburetors. Metering rods can be changed within seconds without having to remove the carb from the engine.

Includes both timed and full vacuum ports for ignition advance. Comes with: Metering Jets – Primary .086, Secondary .095; Metering Rods – .065 x .052; Step-Up Spring – orange (5" Hg).