Gasket price differences
The valve cover gaskets are one of the few things that you should get at the dealership, since it's cheaper there. If you want the valve cover gaskets most Ford and Mazda dealers wil charge approx. $20. If you try to buy the gaskets at an automotive parts store they only sell the full gasket kit for the car, which include the T/B gasket, head gaskets, rings for the bolts and a lot of other parts that you don't need if you are just doing the valve covers.