These headers require a downdraft aftermarket intake manifold.
Model A or B header installation kit
Includes angle brackets, 4 longer studs, 2 intake to header flange gaskets.
Header to block, or Header to Head Gasket
Head Gasket (Copper or GraphTite)
Model B Gr
Model A Cu/Gr
Not Header to Block, or Head Gasket
These headers are built of 16 ga tubing on a 3/8" thick steel flange that has been surfaced on both sides. Metallic-Ceramic coating additional.
Note: Model A headers are one only, not per pair.