Primary Butterfly Kit

Dedenbear's optional Primary Throttle Kit was designed for extremely fast cars and/or engines with huge displacements. In applications demanding E.T. reductions of five-tenths (.5 second) or more, this second set of Bear Stop butterflies and linkage is recommended. Bolt it on in 10 minutes! Unlike similar kits now on the market, Dedenbear's Primary Throttle Kit was developed on a flow bench to maintain an optimum air flow curve. The resulting design effectively adjusts the geometry between the primaries and secondaries throughout throttle travel, much like progressive carburetor linkage.