For a 1966 Mustang, the torque specifications for the exhaust manifold bolts typically range between 20 to 25 ft-lbs. It's important to follow a proper tightening sequence to ensure even pressure across the manifold. Always refer to a service manual for your specific engine type, as variations may exist based on the engine configuration. Additionally, using a torque wrench for accuracy is recommended.
The only reference my manual has to exhaust manifold bolts says to tighten them and bend the locking tabs over.
22
45 ft.lbs.
18 to 22 lbs
17 foot pounds.
29ft lbs
18 ft lb
18 ft lbs
20 ft. lbs...
25 NM25 NM
18 foot pounds
Exhaust mainfold to cylinder head 22 ft-lbsExhaust manifold to header pipe 33 ft-lbsExhaust manifold bracket bolts 20 ft-lbs