Review on Holley 20-13 Secondary Diaphragm Spring π§ Kit: Maximum Performance Upgrade for Reliable Engine Efficiency by Blake Pudic
Holley has gotten cheaper: carburetor and parts
Holley used to paint the entire spring the color it should have been (a long time ago), now just a bit up where it is wears off with normal use so they all mix. A lot of money for a pair of feathers but I needed a set.
Pros
- Free for educational purposes
Cons
- Newer model could be selected
