Cometic C15717-040 Cadillac Northstar 4.6L MLS Cylinder Head Gasket .040" Left Side

The Cometic C15717-040 is a Multi-Layer Steel (MLS) cylinder head gasket designed for the left side of the Cadillac Northstar 4.6L 32-valve V8 engine. Built to exacting tolerances, this gasket delivers superior sealing performance for high-output and performance-built Northstar applications. The .040" compressed operating thickness makes it suitable for standard and lightly modified builds.

Key Features:

• Multi-Layer Steel (MLS) construction — multiple embossed stainless steel layers for maximum strength and resilience
• Viton rubber coating on outer layers provides a micro-seal against combustion gases, coolant, and oil
• 0.040" compressed operating thickness — standard thickness for most Northstar applications
• Left side head gasket — designed specifically for the left cylinder bank of the 4.6L 32V Northstar V8
• No sealant required — installs dry thanks to proprietary high-temperature coatings
• Compatible with both aluminum head to aluminum block and aluminum head to cast iron block configurations
• Resists the shearing forces caused by dissimilar metal thermal expansion
• Corrosion-resistant stainless steel construction for long-term durability

Cometic is a leading manufacturer of high-performance gaskets and engine sealing solutions, trusted across motorsports and OEM applications worldwide. The C15717-040 is part of Cometic's extensive Cadillac Northstar gasket lineup, offering multiple thickness options to accommodate various compression ratios and engine build specifications.