Extreme Diesel Performance Top End Gasket Kit w/Head Studs XDK215 | 2011-2016 Duramax 6.6L LML

GM 6.6L Duramax LML Top End Gasket Kit with Head Studs

This Top End Gasket Kit is the complete solution for servicing or reinstalling the cylinder heads on your GM 6.6L Duramax LML. Perfect for head gasket failures, cylinder head replacement, or top-end engine service, this kit provides the critical components needed to get your engine back on the road.

At the core of the kit is the MAHLE HS54580C Head Set, which offers OE-style gaskets and seals for long-lasting performance. It also includes GM 12637785 and GM 12637788 Grade C (1.05mm) Head Gaskets for both the left and right banks of your Duramax engine. Instead of factory TTY head bolts, this kit upgrades to Gator Fasteners Head Studs, which provide superior clamping force and are reusable.

To ensure proper installation, the kit also includes Thread Cleaning Chasers to prepare engine block threads, giving consistent torque readings. For lubrication, Xtra Slick Engine & Fastener Assembly Lube protects against wear, rust, and corrosion while ensuring smooth installation.

Features:

• Comprehensive kit for top-end engine service
• Includes MAHLE HS54580C OE-style head set
• GM 12637785 & 12637788 Grade C OEM replacement head gaskets
• Gator Fasteners Head Stud Kit for superior clamping force
• Thread Cleaning Chasers for clean, accurate torque readings
• Xtra Slick Engine & Fastener Assembly Lubricant included
• Reusable studs vs. single-use TTY factory bolts
• Helps prevent head gasket failures under heavy load