Thanks to my knowledge gained in practice, I can confidently say that the JBA 063 5930 gasket is an automotive masterpiece. The product installed easily sealing tight and delivering spectacular performance. The gasket eliminated any exhaust leaks and offered increased power and sound for my Ford 4.6L. The finish is also remarkable and outlives other gaskets I've used previously .The only disadvantage is the price, but the value it provides is worth every penny. Recommend for anyone looking to UPGRADE their exhaust system..