This ARP harmonic balancer bolt is built for Small Block Chevy engines, machined from chromoly with a black oxide finish and a 5/8 in 12-point head. A washer is included with the bolt.
Specifications:
- Type: Harmonic Balancer Bolt
- Thread: 7/16-20 in
- Length: 2.470 in
- Head Style: 5/8 in 12-Point Head
- Hardware: Washer Included
- Material: Chromoly
- Finish: Black Oxide
- Quantity: Each
- Part Number: 134-2501
Applications:
- Small Block Chevy engines
FAQ
What engines does this harmonic balancer bolt fit?
This bolt is designed for Small Block Chevy engines.
What are the bolt's dimensions?
The bolt has a 7/16-20 in thread and is 2.470 in long, with a 5/8 in 12-point head.
Is a washer included?
Yes, a washer is included with each bolt.

