Cometic C4950-040 MLS Cylinder Head Gasket for Nissan SR20DE/SR20DET 87mm Bore

The Cometic C4950-040 is a high-performance multi-layer steel (MLS) cylinder head gasket engineered specifically for Nissan SR20DE and SR20DET engines found in 1989-2002 applications. This gasket features Cometic's proven MLX (Multi-Layer Stopper) construction with a compressed thickness of .040 inches, designed to handle the demanding conditions of both naturally aspirated and turbocharged SR20 engines.

Key Specifications:

• Bore diameter: 87mm (3.425 inches)
• Compressed thickness: .040 inches (1.02mm)
• Multi-layer steel construction for superior sealing
• Designed for RWD SR20 applications (S13, S14, S15 platforms)
• Compatible with both SR20DE and SR20DET engines

Features and Benefits:

• MLX stopper layer technology provides additional sealing around combustion chambers
• Increased clamping force distribution prevents head lifting under boost
• Excellent for turbocharged and high-compression builds
• Reusable design allows for multiple installations when properly maintained
• Precision-machined to OEM bore specifications for optimal fit

Cometic's MLS gaskets are a popular upgrade for SR20 engines running increased boost pressure, aftermarket head studs, or higher compression ratios. The .040-inch thickness is ideal for stock deck height applications or can be used to fine-tune compression ratios in modified engines. This gasket is specifically designed for rear-wheel-drive SR20 configurations commonly found in 240SX, Silvia, and 180SX chassis.