looking for the size of the exhaust manifold stud. thread size into manifold and tread size on the end where just the nut is. By trying to match up to the rusted and broke stud i'm thinking its 10x1.0 if so why cant I find one at auto parts,hardware store or even at nut and bolt place. Mazda wants $20.10 plus tax for one stud no nut just the stud. if the size i'm looking for is wrong please help with the correct size. Thanks Sorry it's a 2005 6 with 2.3L A/T non turbo.