Headers, Dougs, 1964-77 CH/EC/MC Gen3/LS, 1-3/4", Full Length

Fitments for a variety of applications

What is the main thing you're looking for when shopping for a new set of headers? Performance of course! With Doug's, you've got it. You'll also get the ease-of-installation and a great selection of applications for all years. Doug's headers feature heavy wall construction with 3/8" thick mounting flanges, ensuring durability and longevity under the most demanding circumstances. All the necessary mounting hardware is included with each set: bolts, gaskets and reducers.

DHD3338 - LS1/LS6 with AC, PB, PS, AT or MT 1-3/4" tubes, 3" collector, SAP Application notes: 180, 181 CH22488 - 396-502 BB with AC, PB, PS, AT only 1-3/4" tubes, 3" collector, SAP Application notes: 52, 69, 133 DH0369C - 265-400 SB with PB, PS, AT or MT 1-3/4" tubes, 3" collector, SAP Application notes: 36, 92, 93 CH22484 - 265-400 SB with AC, PB, PS, AT/MT floorshift only 1-5/8" tubes, 3" collector, oval port Application notes: 36, 92, 93, 96 CH22486 - 265-400 SB with AC, PB, PS, AT only 1-5/8" tubes, 3" collector, oval port Application notes: 5, 36, 92, 93, 96 DHD305C - 265-400 SB with AC, PB, PS, MT floorshift only 1-5/8" tubes, 3" collector, oval port Application notes: 5, 36, 92, 93, 96 CH25268 - 396-502 BB with AC, PB, PS, AT/MT floorshift only 1-3/4" tubes, 3" collector, SAP Application notes: 5, 52, 69 APPLICATION FOOTNOTES: 5 Shorty design for maximum ground clearance 36 Fits D-Port heads including ZZ4 crate engines 52 Will not fit Saginaw close ratio with 825 power steering box 69 Must use stock big-block frame stands and motor mounts 92 Will fit most angle plug heads including factory Chevrolet Bowtie heads 93 Requires removal or modification of locking steering columns if equipped 96 Installation requires use of 1979-later AC compressor bracket and short compressor 133 Does not fit with Powerglide transmission 180 Requires use of LS1 adapter plate kit 181 Includes 3" to 2-1/2" reducers with O² fittings