Headers, Dougs, 1964-77 Chevrolet SB 1-5/8", Full-Length

1964-89 GM Headers, (Chevy 265-400, 1-5/8", Long Tube), by Doug’s Headers®

1.625-inch primary tubes, 3.0-inch collectors and steel long-tube construction.

Doug’s Headers® long-tube headers use 1.625-inch primary tubes and 3.0-inch collectors. The steel tubes meet 3/8-inch head flanges, and the pair includes header gaskets and mounting hardware. Choose metallic ceramic or high-temperature black according to the selected option.

• Construction: steel long-tube headers; 16-gauge tubing and 3/8-inch head flanges. • Primary tube diameter: 1.625 inches; collector diameter: 3.0 inches. • Collector connection: 3-Bolt Flange; exhaust-port shape: Oval. • Finish options: metallic ceramic, high-temperature black. • Supplied as a left/right pair with header gaskets and mounting bolts. • Fitment: 1965–69 Chevrolet Biscayne/Bel Air/Impala: 327 cu. in.; 1965–67 Chevrolet Biscayne/Bel Air/Impala: 283 cu. in.; 1968 Chevrolet Biscayne/Bel Air: 307 cu. in.; 1969–72 Chevrolet Biscayne/Brookwood/Kingswood: 350 cu. in.; 1970–72 Chevrolet Biscayne/Brookwood/Kingswood: 400 cu. in.; 1969, 1971–72 Chevrolet Brookwood/Kingswood: 307 cu. in.; 1968 Chevrolet Chevy II: 307, 327 cu. in.; 1964–68 Chevrolet Chevelle: 327 cu. in.; 1964–67 Chevrolet Chevelle & El Camino: 283 cu. in.; 1968–73 Chevrolet Chevelle: 307, 350 cu. in.; 1970–73 Chevrolet Chevelle: 400 cu. in.; 1969–75 Chevrolet Bel Air: 350 cu. in.; 1970–75 Chevrolet Bel Air: 400 cu. in.; 1966–69 Chevrolet Caprice: 327 cu. in. Air conditioning requires left-side bracket H7608; Requires open-style motor mounts rather than shell-type mounts. • Fitment: 1966–67 Chevrolet Caprice: 283 cu. in.; 1968–69, 1971–73, 1986–89 Chevrolet Caprice: 307 cu. in.; 1970–76 Chevrolet Caprice/El Camino/Impala/Monte Carlo: 400 cu. in.; 1964–69 Chevrolet El Camino: 327 cu. in.; 1968–77 Chevrolet El Camino: 350 cu. in.; 1968–73 Chevrolet El Camino: 307 cu. in.; 1976–77 Chevrolet El Camino/Malibu: 305 cu. in.; 1968–69, 1971–73 Chevrolet Impala: 307 cu. in.; 1973–76 Chevrolet Laguna: 350, 400 cu. in.; 1976 Chevrolet Laguna: 305 cu. in.; 1964–67 Chevrolet Malibu: 283, 327 cu. in.; 1973–77 Chevrolet Malibu: 350 cu. in.; 1973–76 Chevrolet Malibu: 400 cu. in.; 1973 Chevrolet Malibu: 307 cu. in.; 1970–77, 1981–84 Chevrolet Monte Carlo: 350 cu. in. Air conditioning requires left-side bracket H7608; Requires open-style motor mounts rather than shell-type mounts. • Fitment: 1969–73 Chevrolet Nova: 307 cu. in.; 1971–77 GMC Sprint: 350 cu. in.; 1971–73 GMC Sprint: 307 cu. in.; 1971–72, 1974–76 GMC Sprint: 400 cu. in. Air conditioning requires left-side bracket H7608; Requires open-style motor mounts rather than shell-type mounts. • Fitment: 1967–81 Chevrolet Camaro: 350 cu. in. 1967–69 Camaro with air conditioning excluded; Air conditioning: use left-side bracket H7608; 1979-up short-compressor installations may retain the factory bracket; Requires open-style motor mounts rather than shell-type mounts. • Fitment: 1967–69 Chevrolet Camaro: 302, 327 cu. in.; 1969–73 Chevrolet Camaro: 307 cu. in. 1967–69 Camaro with air conditioning excluded; Air conditioning requires left-side bracket H7608; Requires open-style motor mounts rather than shell-type mounts. • Fitment: 1976–81 Chevrolet Camaro: 305 cu. in.; 1980–81 Chevrolet Camaro: 267 cu. in.; 1975–89 Chevrolet Caprice: 350 cu. in.; 1977–89 Chevrolet Caprice: 305 cu. in.; 1969–85 Chevrolet Impala: 350 cu. in.; 1977–85 Chevrolet Impala: 305 cu. in.; 1976–88 Chevrolet Monte Carlo: 305 cu. in.; 1969–79 Chevrolet Nova: 350 cu. in.; 1976–79 Chevrolet Nova: 305 cu. in. Air conditioning: use left-side bracket H7608; 1979-up short-compressor installations may retain the factory bracket; Requires open-style motor mounts rather than shell-type mounts. • Fitment: 1980–82 Chevrolet Caprice: 267 cu. in.; 1979–82 Chevrolet Monte Carlo: 267 cu. in. Requires open-style motor mounts rather than shell-type mounts. • Fitment: 1980–82 Chevrolet Impala: 267 cu. in. • Fitment: 1967–81 Pontiac Firebird. 1967–69 Firebird with air conditioning excluded; Air conditioning: use left-side bracket H7608; 1979-up short-compressor installations may retain the factory bracket; Chevrolet 265–400 small-block engine conversion; Requires open-style motor mounts rather than shell-type mounts. • Accepts D-port/ZZ4 heads; excludes GM Fast Burn 19300955 and SP350, SP383 or ZZ6 engines; Accepts most angle-plug cylinder heads; Modify or remove the steering-column lock linkage where fitted.