I DO NOT HAVE MUCH EXPERIENCE WITH THE DEX COOL ISSUE. BUT ON THE INTAKE GASKETS ON 5.7L VORTECS, I HAVE DONE 6 SINCE THE FIRST OF THE YEAR TIME WILL TELL BUT THE DESIGN OF THE FEL-PRO GASKET APPEARS TO BE BETTER. IF YOU HOLD THEM SIDE BY SIDE THE FEL-PRO DOES... Login to read more.