What is a head gasket? Why buy a head gasket?
The head gasket is located in between the head and the bottom block to help avoid compression leaks and coolant leaks. When the car overheats, there is a chance the head gasket is blown, or if you are running a high horsepower vehicle or one with a lot of boost, it can warp and blow. Aftermarket head gaskets are made out of copper or metal and protect against high horsepower levels and high boost levels.