Skyward Automotive Products SKES72173 Cylinder Head Bolt for GM LS-Series Engines

The Skyward Automotive Products SKES72173 is a precision-engineered cylinder head bolt designed for GM LS-Series engines including 4.8L, 5.3L, 5.7L, and 6.0L applications from 1997 to 2004. This critical fastener ensures proper cylinder head clamping force and sealing integrity during engine assembly or rebuild operations.

Key Features:

• M11 x 2.0 thread size for precise OEM fitment
• Hex head design for standard socket installation
• Manufactured from high-grade steel with natural finish
• Torque-to-yield (TTY) design provides consistent clamping force
• Application-specific engineering meets or exceeds OEM specifications
• Services one cylinder head (two sets required for complete V8 engine)

Important Installation Note: This is a torque-to-yield bolt designed for single-use only. TTY bolts must not be reused as they stretch during installation and will not provide proper clamping force or sealing if reinstalled. Always replace with new bolts during cylinder head service.

Cross Reference: Replaces or crosses to ES72173, compatible with various GM LS engine platforms including LS1, LS6, LQ4, LQ9, LM7, LR4, L59, LM4, L33, and LY2 engine codes.