These head studs will fit all 6.6l Duramax engines including LB7 , LLY , LBZ , LMM.
Pro series cylinder head studs from ARP are cold-forged to ensure molecular integrity. They are heat-treated prior to thread rolling and machining and are rated at a whopping 200,000 psi for the 8740 material and 220,000 psi for ARP2000. ARP Pro series kits are also available with 12-point nuts, and all kits come complete with hardened parallel washers for an even load distribution and accurate torque readings.
These head studs can also be added to any Diesel Care kit, engine, or product for an additional charge. This product carries the manufacturers original warranty, which you can find further information through ARP, Inc.
( 6.6L 6.6 66 66L 66 L )