The Holley 37-933 is a Trick Kit master rebuild package for Holley vacuum secondary and double pumper carburetors. Beyond the standard gaskets, needle and seats, power valves, and accelerator pump diaphragms, it adds the extra calibration parts a serious tuner needs -- accelerator pump discharge nozzles and additional gaskets -- and the packaging doubles as a parts tray. A carburetor exploded view and detailed tuning guide are included.

Holley 37-933 Kit Contents:

• Trick Kit rebuild kit for vacuum secondary and double pumper carburetors
• Includes gaskets, needle and seats, power valves, and pump diaphragms
• Adds extra tuning parts and accelerator pump discharge nozzles
• Includes exploded view and detailed tuning guide
• Sold as a kit