Ok, so here we go again with a Dorman Intake leak. Without getting too deep into it, first off when I pulled the intake I noticed that the part number on the car was a 615-178. This intake shows to be for Crown Vic, Explorers, ect., although they both have 4.6's. The part number that shows for my Mustang is 615-175. I looked at both intakes beside each other and I could not see any differences between them, neither could the other 2 guys that were there. I think it's a good time to go on and get the KB 2.1. I don't want to to spend the money on any aluminum intake since I've been waiting to get the KB. One thing that kinda concerns me is when I got the first intake off and began to clean the head surface, I noticed that there were some pitted places right where the gasket seals around the water passage. The pitted places are at the front and rear on the driver side head. At the rear is where the first intake began to leak. I replaced the intake with the correct number and now it is leaking too. This time it is not leaking at the head and intake surface, but around the base of the t-stat housing. I am certain that I torqued everything down correctly and in sequence. I also was very careful when installing to be sure that I didn't set it down and slide it around. Now, my concern is that if I get the KB do any of you think that I would have any issues with the pitted areas not sealing well enough allowing for vacuum leaks? I know that it would be best to see the pitting, but the intake is still on the car and I'm wanting to decide what I'm going to do about replacing the intake with the KB before I remove anything, so I can't post any pictures. I don't know what type of gaskets the KB uses and if they would seal properly. What thoughts do you all have about this?