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Price: $33.97
New Mr Gasket locking header bolt kit. 3/4\" UHL. This is for V8 Pontiac/Oldsmobile series engines, with factory exhaust manifolds or headers with a 5/16\" or thinner flange. Locking header bolts do not loosen when installed properly. The underhead of the bolts are serrated, preventing loosening. Header bolts have double hex head. Sold as a package of 12 bolts with socket. Bolts are stainless. Fits the following:77-79 Firebird/Trans Am w/ 403 Olds engine