AFR's cylinder head bushing set includes 20 black zinc oxide steel bushings machined to 0.500in OD and 7/16in ID, built for Small Block Ford head bolt installation.
Specifications:
- Outer Diameter: 0.500 in
- Inner Diameter: 7/16 in
- Material: Steel
- Finish: Black Zinc Oxide
- Quantity: Set of 20
- Part Number: 6324
Applications:
- Small Block Ford
FAQ
What engine platform is this bushing set for?
Small Block Ford.
What are the OD and ID dimensions?
0.500 in OD, 7/16 in ID.
What material and finish do the bushings have?
Steel with a black zinc oxide finish.
How many bushings come in this set?
A set of 20.

