Headers for 1973-1987 Trucks and 1973-1991 Suburbans, Blazers and Jimmys. Part numbers THY-304Y-C. These are set up for dual exhaust (no-y-pipe included) and are not CARB legal unless your truck was originally equipped with dual exhaust.
These Doug Thorley Tri-Y 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!