Size?
 

Hey Randy do you happen to know the size of the nuts that go on the headers studs where the h-pipe and the headers meet. One came off and has a nasty leak there was a goof ball at the Ford dealership here who gave me the wrong ones. Oh and maybe a gasket for the passenger side just incase that slipped off. Thanks.

*My car is a 2001 GT if that helps

well the nut for the down pipe on the "factory" exhaust mainfolds is 10mm x 1.5mm and the part # is N800419-S301 $2.15 each and we're out but can get more if this is the right size., now if you have headers on it, I can't be sure of the size. now the down pipe gasket is a XR3Z-9450-AA and sells for $6.69 and is in stock,

Are you sure....all I know is it take a 15mm socket to take it off. I'm an idiot when it comes to sizing there things are you sure thats right and is it possible to pick these parts up at a local auto parts store?

Hahahaha,... he said Nuts, Head, and Stud.

You need a life.....lol

am I sure? well thats the info provided to me by FoMoCo :D can you get localy, sure or we can order but if your in a hurry, you best bet is local.