The Cometic Gasket Automotive C5030-040 is a cutting-edge Multi-Layer Extreme (MLX) cylinder head gasket specifically designed for the GM LS7 Gen-4 Small Block V8 engine. Featuring advanced sealing technology, this gasket provides unmatched performance under the most demanding conditions. The 4.150-inch bore size and .040-inch compressed thickness make it an ideal choice for high-compression, forced induction, and nitrous builds. Constructed with high-strength materials and a stress-formed stopper layer, the C5030-040 guarantees reliability and durability for both street and race applications.

Technical Specifications

Gasket Construction:

• Type: Multi-Layer Extreme (MLX)
• Material: 301 Stainless Steel
• Coating: Temperature-resistant polymer coating
• Compressed Thickness: 0.040" (1.016mm)
• Bore Size: 4.150"

Performance Specifications:

• Engine Compatibility: GM LS7 Gen-4 Small Block V8
• Maximum Bore Size: 4.150"
• Maximum Combustion Pressure: 1,800 psi
• Temperature Range: -40°F to 500°F (-40°C to 260°C)
• Torque Retention: 95% minimum
• Maximum Boost Pressure: 30 psi
• Recommended Surface Finish: 30-60 Ra

Features:

• MLX construction for superior sealing in high-performance engines.
• Proprietary stress-formed stopper layer for enhanced combustion chamber sealing.
• High-strength stainless steel layers for durability and heat resistance.
• Coated with temperature-resistant polymer to prevent leakage.
• Ideal for high-compression and boosted applications.

Benefits:

• Provides a secure and reliable seal under extreme cylinder pressures.
• Compatible with nitrous and forced induction systems.
• Prevents gasket blowouts, even under the harshest conditions.
• Minimal maintenance required with no retorque necessary.
• Perfect fit for GM LS7 engines ensures hassle-free installation.

Installation Requirements:

1. Ensure the block and head surfaces are flat and clean.
2. Maintain a surface finish of 30-60 Ra for optimal sealing.
3. Follow the OEM torque sequence and specifications.
4. Avoid using additional sealants or adhesives.

Application Notes:

• Designed for GM LS7 Gen-4 Small Block V8 engines.
• Ideal for street/strip dual-purpose, high-performance, and race applications.
• Compatible with high-compression, turbocharged, and nitrous-oxide setups.

Manufacturing Standards:

• ISO 9001:2015 Certified
• SAE J1086 Compliant
• ASTM F36 Testing Protocol

Package Contents:

• 1x C5030-040 MLX Cylinder Head Gasket
• Installation Instructions
• Technical Documentation