Main Stud Kit for Chevrolet Chevy Duramax 6.6L (LB7/LLY) (2005 & earlier)

Main Stud Kit for Chevrolet Chevy Duramax 6.6L (LB7/LLY) (2005 & earlier)There are many important reasons to use ARP main stud kits, including the elimination of main cap walk and fretting, as well as protecting the threads in your engine block. All kits come complete with hardened parallel ground washers and high quality nuts. Some applications have provisions for mounting windage trays and have specially designed standoff studs with serrated lock nuts to position the windage tray and lock it securely in place. The studs

Drive pins are rated 190

These fasteners play a key role in both the performance and safetyof a vehicle

They have a tensile strength of 190

ARP uses a unique manufacturingprocess where the alignment sleeve is roll formed onto the shaft(not welded or pinned)

Pro Series main bolts are application-specific

Available in black oxide finish 8740 chrome moly or polished stainless steel with hex or 12-point nuts

Kits come with hardened parallel-ground washers

Because ARP studs are manufactured to suchexacting tolerances

12-point head design and larger than stock shank diameter for increased strength and improved flywheel register

Don’t chance it

each stud is placed verticallyinto special racks and precisely heat-treated to 190

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