The 20-12 Accelerator Pump Cam Assortment Kit is designed to fine-tune fuel delivery during throttle opening on for Holley carburetors. By changing cam profiles, users can precisely control pump shot timing and volume, helping eliminate hesitation, bogging, and poor throttle response.
 With 8 different cam profiles, this for Holley accelerator pump cam kit allows customized tuning for various engine setups, from street performance to racing applications. Compatible with for Holley 2300, 4150, and 4160 carburetors, it is an essential tuning tool for muscle cars, classic vehicles, and performance carburetor builds.