The Bullet Proof Diesel H-Core EGR Coolers for Ford 6.7L Power Stroke are designed to provide durability, reliability, and longer service life. The EGR coolers feature the company's patented H-Core technology that allows for the natural expansion and contraction of cooling tubes inside the EGR cooler, limiting structural failure. The H-Core construction also increases the surface area of the coolant tubes within the EGR coolers.