Description

This ARP 155-5201 BBF Pro Series Main Bolt Kit is for 390-428 FE 2-bolt main engines. It comes with 190,000 PSI 8740 Chromoly Steel bolts with 12-Point heads. This is up to 5X stronger than stock! All ARP main bolts feature a reduced wrenching head as well as a large underhead radius.

Rolling the threadsafter heat-treating gives them about 2000% better fatigue strength than most main bolts threaded prior to heat-treating.This provides the utmost in reliability!

Kits come complete with hardened parallel-ground washers.

ARP 155-5201 BBF Main Bolt Kit Fits:

• 390-428 FE 2-bolt main engines

ARP designs their Main Bolts to be far superior to any other main bolts available for use in competition engines. They meet the exacting standards and demands of professional engine builders!

The popular High Performance Series is rated at 180,000 psi, and is a premium replacement for OEM fasteners.

Pro Series main bolts are application-specific, rated at 190,000 psi, and designed for use in competition engines. Hardened parallel-ground washers included with each kit.