E&J Apex Seals are machined to precision with thestate of the art wire EDM machine. The seals are design to hold more heat and to create higher compression levels than the competition. Today our seals are in the world fastest cars and top contenders. They are making themselves known as the best for street and strip application. The best part of the E&J seals is that they will not damage the housings. E&J Apex Seals are racers #1 choice.