This ARP header bolt kit is machined from stainless steel and polished, designed for Small Block Chevy engines. It features a drilled 12-point head, 3/8-16 in thread, and 0.750 in UHL, and comes as a set of 12.
Specifications:
- Head Style: 12-Point
- Bolt Feature: Drilled
- Thread Size: 3/8-16 in
- Length (UHL): 0.75 in
- Material: Stainless
- Finish: Polished
- Quantity: Set of 12
Applications:
- Small Block Chevy
FAQ
What is the ARP 400-1203 header bolt kit for?
It is a header bolt kit designed for Small Block Chevy engines.
What head style do the bolts have?
They have a drilled 12-point head.
What size are the bolts?
They use a 3/8-16 in thread with a 0.750 in UHL (under-head length).
What material and finish do the bolts have?
They are stainless steel with a polished finish, part #400-1203.

