Well, these fittings will leak: between the o-ring and AN6/AN6 male adapter - especially if it is overtightened: step 38 in the instruction manual mentions this. I also found the union on the SS lines to weep as well - will likely swap this out for barbed fittings. The AN6/AN6 blue colored male fitting that threads into the fuel rails is aluminum. Aluminum's coefficient of expansion is twice that of carbon steel for any given rise in temperature. Yep, it's easier to ensure torque settings for two materials with similar rates of expansion: a T6 aluminum union nut instead of the steel one supplied with the braided steel install kit might correct this.