The Mr Gasket Valve Cover Gaskets are designed specifically for Chevy 265-400 V8 engines, featuring a 5/16 thickness for added durability and performance. Made of high-quality rubber, these gaskets provide a secure seal to prevent leaks in the engine compartment. With a pack of 2 gaskets included, this product ensures a reliable and leak-free seal for your vehicle. These valve cover gaskets are a performance part that enhances the overall functionality of your engine, making them a necessary accessory for any Chevy V8 owner.