Replace Damaged or Missing Header Bolts
If you have a set of headers on your 1996-2004 Mustang you have to keep the bolts tight to retain a proper seal. Most header gasket failures are not the fault of the gasket but are due to loose or missing header bolts.
Works on Most Headers
BBK header bolts for Ford Modular engine feature a 25mm underhead length, making them them long enough to work with all BBK headers or any other headers with up to a 3/8" flange.
1996-2004 4.6L and 5.4L Engines with Headers