Exhaust Manifold: 69 Pontiac "D-port Long Branch"These exhaust manifolds are precise replicas of the rare and genuine 1969 Firebird Pontiac V8 standard "D Port" factory headers cast # is being 9779495 1 & 94. Each side has a 6 stud to head configuration and 2 stud flange. NOT INCLUDED Optional purchase for around A$150 is the Ram Air oil filter extension adaptor.. needed if fitting to a non original Ram Air Engine. You will need to re route the starter motor wiring also. Special order only.. 2 4