Headers for 1964-1973 Pontiac GTO and Lemans cars. The headers are a 3-port design eliminating blown exhaust gaskets between the center ports. Part number THY-341-C.
These Doug Thorley headers are constructed of 14-gauge tubing with 3/8-inch flanges to give you the best quality you can get in a header! Plus they are ceramic coated to give a lifetime of performance!