I got my header gaskets from Mancini for my INDY heads and some more stuff i order the part numbers and i got the right ones from Mancini but if you get the wrong part it makes you mad as hell i can not get the silicone on headers to stay sealed up when i go on the 2 step after 4 or 5 times it blows out so i run only Mr gasket Ultra seal i get them from JEGS or MANCINI. GOOD LUCK.