Cometic Gaskets .040" MLS Head Gasket for Jeep Wagoneer 1974-1978, 4.250" Bore

If you're diving into the world of high-performance engines, you know how crucial a solid head gasket is. That's where the COMETIC MLS (Multi-Layer Steel) Head Gasket comes into play. These gaskets are built for serious power, designed to handle the demands of today's high-output engines without needing any sealants. Trust me, when you're pushing your ride to the limit, you want something that won't let you down. What I love about these MLS gaskets is their versatility. They're perfect for setups with aluminum heads on aluminum blocks or even aluminum heads on cast iron blocks. The way they handle the shearing forces between different materials is impressive. Made from multiple layers of stainless steel, these gaskets pack a punch in terms of strength. Plus, they rebound nicely, which is essential for maintaining a tight seal over time. Now, let’s talk about the materials. The outer layers are embossed and coated with Viton , a tough rubber-like material that can take the heat—up to 250°C (482°F) to be exact. This stuff is designed for harsh conditions, so you can rest easy knowing it can handle whatever your engine throws at it. The center layer, which is uncoated stainless steel, can be adjusted for various thickness needs, making it a flexible choice for different builds. Specifically, this gasket is tailored for the AMC 390/401 V8 engines, with a gasket bore of 4.250 inches and a compressed thickness of .040 inches. It's a solid fit for a range of American Motors vehicles, including classics like the Ambassador and Javelin , as well as some Jeep models like the CJ5 and Wagoneer . In terms of fitment, this gasket works with a variety of models, such as: So, if you're looking to seal the deal on your engine rebuild or upgrade, the COMETIC MLS Head Gasket is a no-brainer. It’s tough, reliable, and ready to handle the heat—just like your engine. Other Part Numbers: Cometic Gaskets #cgsC5937-040 Proposition 65 ⚠ WARNING: Cancer and Reproductive Harm https://www.P65Warnings.ca.gov