MLS Head Gasket - BBC 4.580 x .040

The MAHLE ORIGINAL/CLEVITE MLS Head Gasket – BBC 4.580 x .040 is a multi-layer steel cylinder head gasket engineered for Big Block Chevy engines with Gen V and Gen VI specifications. This gasket delivers the precision sealing required to maintain compression integrity and prevent coolant or oil leakage in high-performance and stock applications alike. Designed with a 4.580-inch bore diameter and 0.040-inch compression thickness, it meets the exact dimensional requirements of late-generation BBC platforms where OEM or near-OEM gasket specifications are essential.

MAHLE's multi-layer steel construction combines stainless steel facings with a composite core to distribute clamping load evenly across the cylinder head and block surfaces. This design reduces the risk of hot spots and localized gasket failure that can occur under sustained boost, high RPM, or aggressive ignition timing. The 0.040-inch thickness is optimized for stock or mildly ported heads where compression ratio and combustion chamber geometry depend on standard gasket height. Proper installation torque sequence and head bolt tension are critical to achieving full gasket performance—adherence to engine manufacturer specifications is mandatory.

This gasket suits engine builders, automotive technicians, and BBC enthusiasts performing head gasket replacement on Gen V/Gen VI applications—whether during routine maintenance, repairs following overheating events, or complete engine refreshes. It is equally suited for street engines and moderate performance builds where reliability and proper sealing are non-negotiable. The MAHLE ORIGINAL/CLEVITE brand is recognized in the OEM and aftermarket engine rebuild sector for manufacturing precision gaskets that meet or exceed factory specifications. Each gasket is sold individually (quantity: 1 per order), so verify the complete gasket set requirements for your specific BBC configuration before purchase.