Dedenbear PK1 Carburetor Return Spring

Primary Throttle Kit; Primary Butterfly Kit; For Use w/TS1 Standard Holley Stops
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Primary Throttle Kit; Primary Butterfly Kit; For Use w/TS1 Standard Holley Stops;

  • WARNING CA Proposition 65 Message: Warning: This product can expose you to chemicals; which are known to the State of California to cause cancer. For more information; visit

  • Primary Butterfly Kit for TS1

Dedenbears optional Primary Throttle Kits are designed for extremely fast cars and / or engines with huge displacements. In applications demanding E.T. reductions of five-tenths (0.5 seconds) or more, this second set of Bear Stop butterflies and linkage is required. Unlike other kits available in the market, Dedenbears 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 the throttle travel, much like a progressive carburetor linkage. The Dedenbear Primary Throttle Kit fine tunes the Bear Stops effectiveness and response over the entire throttle range.

Dedenbear Products, Inc. has been helping drag racers trip the win lights since 1979 and is the originator for the product type now universally known as Delay Boxes. Dedenbear produces a wide range of innovative specialist and quality racing components including; delay boxes, remote displays, nitrous timers, auto shifters, throttle stops, CO2 accessories and water pumps.

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