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Doug's Headers D369 Full Length Header, 1-3/4 In, 64-75 Chevelle, CC
Doug's Headers D369 Full Length Header, 1-3/4 In, 64-75 Chevelle, CC

Doug's Headers D369 Full Length Header, 1-3/4 In, 64-75 Chevelle, CC

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Doug's Headers D369 Full Length Header, 1-3/4 In, 64-75 Chevelle, CC
Doug's Headers D369 Full Length Header, 1-3/4 In, 64-75 Chevelle, CC
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Part # 447D369
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Doug's PASSENGER CAR HEADERS Long Tube Metallic Ceramic CoatedHeader development and design is complex and requires a substantial amount of time and resources to do the job right! Many manufacturers are unwilling to make the commitment and instead offer compromised headers at lower prices. Doug's will not compromise performance, quality or fit to compete with inferior designs at cheap prices. Every Doug's header is tuned with the proper tube size and length to efficiently remove all the exhaust from each cylinder, reducing pumping losses resulting in a dramatic increases in horsepower and torque. Doug's headers are carefully developed on the vehicles they are intended to fit and are re-checked numerous times during the design and manufacturing process.

  • 3/8" Thick machined flanges... no warping
  • CNC mandrel bent tubes... accurate fit & better flow
  • Precision formed long transition collectors and long tube design... reduces backpressure and increases higher RPM horsepower
  • Heavy 16 gauge tubing... longer life
  • Tubes are pre-polished to remove scratches and the header isfinished with a Metallic Ceramic Thermal Barrier Coating polished to a high luster appearance offering corrosion and heat resistance up to 1400 degrees

Installation Instructions (PDF)


1964-1967 Chevrolet Chevelle 4.6L/283 V8
1964-1968 Chevrolet Chevelle 5.3L/327 V8
1968-1973 Chevrolet Chevelle 5.7L/350 V8
1968-1973 Chevrolet Chevelle 5L/307 V8
1965-1969 Chevrolet Chevelle 6.5L/396 V8
1970-1973 Chevrolet Chevelle 6.6L/400 V8
1964-1967 Chevrolet El Camino 4.6L/283 V8
1964-1969 Chevrolet El Camino 5.3L/327 V8
1968-1975 Chevrolet El Camino 5.7L/350 V8
1968-1973 Chevrolet El Camino 5L/307 V8
1966-1969 Chevrolet El Camino 6.5L/396 V8
1970-1975 Chevrolet El Camino 6.6L/400 V8
1964-1967 Chevrolet Malibu 4.6L/283 V8
1964-1967 Chevrolet Malibu 5.3L/327 V8
1973-1974 Chevrolet Malibu 5.7L/350 V8
1973 Chevrolet Malibu 5L/307 V8
1965-1967 Chevrolet Malibu 6.5L/396 V8
1973-1975 Chevrolet Malibu 6.6L/400 V8


  • Doug's Headers D369 1 3/4" 4-Tube Full Length Header Chevrolet Chevelle Small Block Chevrolet 64-75 Metallic Ceramic Coating
  • Ceramic Coated
  • Collector: 3
  • Port: SAP
  • Primary: 1 3/4
  • exc. states w/Calif. emission stds
  • Fits D-Port heads
  • Requires removal or modification of locking steering columns
  • with Column Shift
  • without A/C
  • For Off-Road Use Only
  • with Floor Shifter
Some parts are not legal for use in California or other states with similar laws/regulations

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