Headers, LS Swap, Doug's, 1964-67 Chevelle, 3", 1-7/8", Long Tube

1964-67 GM A-Body Headers, (LS Swap, 1-7/8", Long Tube), by Doug’s Headers®

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

Doug’s Headers® long-tube headers use 1.875-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: 1.875 inches; collector diameter: 3.0 inches. • Collector connection: V-Band; exhaust-port shape: Round. • Finish options: metallic ceramic, high-temperature black. • Supplied as a left/right pair with header gaskets and mounting bolts. • Fitment: 1964–67 Buick Skylark/Sportwagon. • Fitment: 1964–67 Chevrolet Chevelle & El Camino. • Fitment: 1967 Chevrolet Malibu. • Fitment: 1964–67 Pontiac GTO/LeMans/Tempest. • Chevrolet LS engine conversion; Use Doug’s Headers® engine and transmission mounting kits. • Transmission: most GM automatics and Tremec T56/T56 Magnum manuals. Factory column linkage does not clear; automatics need custom linkage or a cable conversion. A floor shifter and hydraulic clutch are recommended for manuals. • Requires Doug’s Headers® SK103 engine brackets; use the appropriate Doug’s Headers® transmission crossmember. Angled spark-plug boots are required. • 4L80/4L85 installations require bellhousing trimming; uses Doug’s Headers® DES103 exhaust system.