Main Bolt Kit for Chevrolet World - Merlin II & III iron blocks

Main Bolt Kit for Chevrolet World - Merlin II & III iron blocksFar superior to any other main bolts available for use in competition engines, ARP main bolts are designed to meet the exacting standards and demands of professional engine builders. Forged from 8740 chrome moly steel, all ARP main bolts feature a reduced renching head, large underhead radius and rolled threads for the utmost in reliability. The threads are rolled after heat treating which gives them about 2000% better fatigue strength than most main

while the compact head is easily accessed

each stud is centerless ground to makeit as close to perfectly concentric as possible

self-locking nuts

For openers

000 psi and precision machined for optimum thread engagement

originally developed for NASCAR competition

A hollow core serves to reduce the reciprocating mass

Whether you’re mounting your fan directly to the water pump

ARP’s timing cover bolts are available in both polished stainless steel or black oxide finish chrome moly

then allow the nuts to be easily installed without the worry of cross-threading

If there is a permanent increase of

This procedure (done only to the shorter studs)more equalizes the “stretch” of both studs