Holley 20-12 Accelerator Pump Cam

4.3 4.3 out of 5 stars | 109 ratings

Price: 35.96

Last update: 01-24-2025


About this item

Each Cam Is Different Shape/Profile
Gives Different Results
Tailor Accelerator Pump Performance
Each camshaft has a different shape or profile

Product information

Technical Details

Item Package Dimensions L x W x H ‎6.5 x 3.39 x 0.39 inches
Package Weight ‎0.02 Kilograms
Item Weight ‎0.01 Kilograms
Brand Name ‎Holley
Warranty Description ‎Warranty
Model Name ‎Holley 20-12 Accelerator Pump Cam
Color ‎No Color
Material ‎Plastic
Suggested Users ‎unisex-adult
Number of Items ‎1
Manufacturer ‎Holley
Part Number ‎2012
Included Components ‎Holley 20-12 Accelerator Pump Cam
Size ‎No Size

Top reviews from the United States

  • Brad
    5.0 out of 5 stars Very impressed
    Reviewed in the United States on July 2, 2023
    Had all I needed to eliminate my off idle bog
  • Mike
    5.0 out of 5 stars Does not fit Demon Carbs
    Reviewed in the United States on August 21, 2023
    Returned
  • george a.
    5.0 out of 5 stars Doubled the order
    Reviewed in the United States on January 31, 2023
    Carbureter tune up
  • John H
    4.0 out of 5 stars Pump cams..
    Reviewed in the United States on September 10, 2023
    Fixed my lean spike. Ended up using the brown cam. A little pricey for what they are. But i have extras for the future.
  • J Reed
    1.0 out of 5 stars Come on Holley, you're better than this...
    Reviewed in the United States on October 14, 2018
    So I got the 8 pump cams, and the two screws. All looked good until I started to look closely at the cams. I grabbed the blue cam which is why I ordered this kit. I start to look closely, and I notice it has #234 stamped on it. I look at the black cam, which looks the same, and it also has 234. After looking at the #'s I should have, the blue cam should be stamped with 427. Someone must have dumped blue plastic into the black cam mold, thus giving me two black cams in two difference colors. I can't believe I'm about to request a return for a bunch of plastic. Very frustrating.
    Customer image
    J Reed
    1.0 out of 5 stars Come on Holley, you're better than this...
    Reviewed in the United States on October 14, 2018
    So I got the 8 pump cams, and the two screws. All looked good until I started to look closely at the cams. I grabbed the blue cam which is why I ordered this kit. I start to look closely, and I notice it has #234 stamped on it. I look at the black cam, which looks the same, and it also has 234. After looking at the #'s I should have, the blue cam should be stamped with 427. Someone must have dumped blue plastic into the black cam mold, thus giving me two black cams in two difference colors. I can't believe I'm about to request a return for a bunch of plastic. Very frustrating.
    Images in this review
    Customer image Customer image
  • Tom
    3.0 out of 5 stars conterfeit
    Reviewed in the United States on October 24, 2023
    These are not genuine Holley parts. But, they are identical and indistinguishable once out of the package, and are available with same day delivery so what are you gonna do lmao
  • Becky Scoby
    5.0 out of 5 stars Looked & worked like the OEM cam on my carb.
    Reviewed in the United States on October 27, 2014
    Not a lot of discernable differences in some of the cam profiles, but I was able to bump mine up a couple sizes on my 2 barrel Holley carb (4.3L GL-D Volvo Penta engine) to get my boat running phenomenal. I was having a little off-idle acceleration stumble until rebuilding the carb and changing this. Glad I didn't need to mess with my accelerator pump nozzles; this was the trick!
  • Mike Skurok
    5.0 out of 5 stars Work awesome, can't tune a Holley without them
    Reviewed in the United States on October 19, 2015
    Work awesome, can't tune a Holley without them.I had to go three colors up from the stock ones to get the response I was looking for. Mixture screws set at 2 3/4 turns.

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