Engine builders, listen up. This Edelbrock 7329 Cylinder Head Gasket is the real deal for sealing up your performance motor. The specs are key: it's got a 4.275-inch bore diameter, which fits a lot of popular V8 builds. It's 0.045 inches thick when compressed, and it's designed with a 10.6cc combustion chamber volume - that's important for getting your compression ratio right. It comes in a two-piece configuration (gray in color) which makes installation easier. Edelbrock makes these specifically to work perfectly with their own cylinder heads and intakes, so there's no weird fitment issues or port misalignment. But the good news is, they also work great with most stock iron or aluminum heads and other aftermarket parts too. The materials are top-notch, designed to seal really well without needing a ton of clamping force from the head bolts, and they last. If you're assembling a motor for street performance, a weekend racer, or a restoration project, using a quality gasket like this is one of the best ways to prevent leaks and head gasket failure down the road. Don't cheap out on the seal between your block and head!