Doug's Headers - D322

Doug's Headers D322 2" 4-Tube Full Length Header Chevrolet Chevelle Big Block Chevrolet 64-77 Metallic Ceramic Coating

Doug's Headers D322 2" 4-Tube Full Length Header Chevrolet Chevelle Big Block Chevrolet 64-77 Metallic Ceramic Coating

Part Number: D322 / UPC 694342507220
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Highlights

  • 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 is finished with a Metallic Ceramic Thermal Barrier Coating polished to a high luster appearance offering corrosion and heat resistance up to 1400 degrees

Additional Information

Doug's PASSENGER CAR HEADERS Long Tube Metallic Ceramic Coated Header 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.

Installation instructions

Instruction Manual
Installation Instructions

Download PDF

Shipping & Delivery

Our ignition and exhaust products ship from our warehouse in Lenexa, KS. Our normal shipping time is 2-3 business days for in-stock parts.

 Shipping Class Order Value Shipping Cost
UPS Ground $0 - 49.99 $6.99 flat rate
UPS Ground $50 - 98.99 $7.49 flat rate
UPS Ground $99+ Free

  • At this time, PerTronix does not offer expedited shipping options from our website.
  • All packages must be inspected upon receipt for any missing or damaged goods and claims for such must be made within 7 days of receipt.
  • PerTronix does not currently ship our products internationally from our web store. For international orders call 909-599-5955 or connect with us here.

Returns & Replacements

Returns at Pertronix are accepted within 90 days of purchase with prior authorization, ensuring items are in new, resalable condition. To initiate a return, call for an RGA and follow provided instructions. Customers are responsible for return shipping, using a trackable method.

Refunds exclude initial shipping and handling fees and may be subject to a restocking fee. For defective or damaged items, contact Pertronix directly. We are not responsible for user-initiated damage/loss of parts.

For complete details, visit our Returns page.

Reviews

Doug's Headers - D322

Doug's Headers D322 2" 4-Tube Full Length Header Chevrolet Chevelle Big Block Chevrolet 64-77 Metallic Ceramic Coating

Doug's Headers D322 2" 4-Tube Full Length Header Chevrolet Chevelle Big Block Chevrolet 64-77 Metallic Ceramic Coating

Part Number: D322 / UPC 694342507220
Regular price $1,142.95
Sale price $1,142.95 Regular price

Part Number: D322 / UPC 694342507220
View All Vehicle Applications

Need help? Call us at 909-599-5955

  • Free shipping on $99+ orders in lower 48 states
  • 90-day return policy
  • We’re here to help! Call us on 909-599-5955
Emissions code

Emissions Code

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Highlights

  • 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 is finished with a Metallic Ceramic Thermal Barrier Coating polished to a high luster appearance offering corrosion and heat resistance up to 1400 degrees

Additional Information

Doug's PASSENGER CAR HEADERS Long Tube Metallic Ceramic Coated Header 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.

Installation instructions

Instruction Manual
Installation Instructions

Download PDF

Shipping & Delivery

Our ignition and exhaust products ship from our warehouse in Lenexa, KS. Our normal shipping time is 2-3 business days for in-stock parts.

 Shipping Class Order Value Shipping Cost
UPS Ground $0 - 49.99 $6.99 flat rate
UPS Ground $50 - 98.99 $7.49 flat rate
UPS Ground $99+ Free

  • At this time, PerTronix does not offer expedited shipping options from our website.
  • All packages must be inspected upon receipt for any missing or damaged goods and claims for such must be made within 7 days of receipt.
  • PerTronix does not currently ship our products internationally from our web store. For international orders call 909-599-5955 or connect with us here.

Returns & Replacements

Returns at Pertronix are accepted within 90 days of purchase with prior authorization, ensuring items are in new, resalable condition. To initiate a return, call for an RGA and follow provided instructions. Customers are responsible for return shipping, using a trackable method.

Refunds exclude initial shipping and handling fees and may be subject to a restocking fee. For defective or damaged items, contact Pertronix directly. We are not responsible for user-initiated damage/loss of parts.

For complete details, visit our Returns page.

Reviews

Applications

Year / Make / Model 1970-1972 Chevrolet Biscayne
Engine Type V8
Engine Size(s)
  • 454 Cubic Inches
  • 402 Cubic Inches
Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Does not fit with power glide transmission.

  • Year / Make / Model 1970-1972 Chevrolet Brookwood
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    • 402 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Does not fit with power glide transmission.

  • Year / Make / Model 1968-1969 Chevrolet C10 Pickup
    Engine Type V8
    Engine Size(s)
    • 396 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1970-1972 Chevrolet C10 Pickup
    Engine Type V8
    Engine Size(s)
    • 402 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1973-1974 Chevrolet C10 Pickup
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1968-1969 Chevrolet C20 Pickup
    Engine Type V8
    Engine Size(s)
    • 396 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1970-1972 Chevrolet C20 Pickup
    Engine Type V8
    Engine Size(s)
    • 402 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1973-1974 Chevrolet C20 Pickup
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1970-1972 Chevrolet Kingswood
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    • 402 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Does not fit with power glide transmission.

  • Year / Make / Model 1965-1970 Chevrolet Chevelle
    Engine Type V8
    Engine Size(s)
    • 396 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Does not fit with power glide transmission.

  • Year / Make / Model 1970-1973 Chevrolet Chevelle
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Does not fit with power glide transmission.

  • Year / Make / Model 1970-1972 Chevrolet Chevelle
    Engine Type V8
    Engine Size(s)
    • 402 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Does not fit with power glide transmission.

  • Year / Make / Model 1970-1975 Chevrolet Bel Air
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Does not fit with power glide transmission.

  • Year / Make / Model 1970-1972 Chevrolet Bel Air
    Engine Type V8
    Engine Size(s)
    • 402 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Does not fit with power glide transmission.

  • Year / Make / Model 1975-1980 Chevrolet C10
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1968-1969 Chevrolet C10 Suburban
    Engine Type V8
    Engine Size(s)
    • 396 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1970-1972 Chevrolet C10 Suburban
    Engine Type V8
    Engine Size(s)
    • 402 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1973-1980 Chevrolet C10 Suburban
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1975-1986 Chevrolet C20
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1968-1969 Chevrolet C20 Suburban
    Engine Type V8
    Engine Size(s)
    • 396 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1970-1972 Chevrolet C20 Suburban
    Engine Type V8
    Engine Size(s)
    • 402 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1973-1986 Chevrolet C20 Suburban
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1970-1972 Chevrolet Camaro
    Engine Type V8
    Engine Size(s)
    • 402 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Does not fit with power glide transmission.

  • Year / Make / Model 1970-1976 Chevrolet Caprice
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Does not fit with power glide transmission.

  • Year / Make / Model 1970-1972 Chevrolet Caprice
    Engine Type V8
    Engine Size(s)
    • 402 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Does not fit with power glide transmission.

  • Year / Make / Model 1966-1970 Chevrolet El Camino
    Engine Type V8
    Engine Size(s)
    • 396 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Does not fit with power glide transmission.

  • Year / Make / Model 1970-1973 Chevrolet El Camino
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Does not fit with power glide transmission.

  • Year / Make / Model 1970-1972 Chevrolet El Camino
    Engine Type V8
    Engine Size(s)
    • 402 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Does not fit with power glide transmission.

  • Year / Make / Model 1970-1976 Chevrolet Impala
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Does not fit with power glide transmission.

  • Year / Make / Model 1970-1972 Chevrolet Impala
    Engine Type V8
    Engine Size(s)
    • 402 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Does not fit with power glide transmission.

  • Year / Make / Model 1965-1967 Chevrolet Malibu
    Engine Type V8
    Engine Size(s)
    • 396 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Does not fit with power glide transmission.

  • Year / Make / Model 1973-1975 Chevrolet Malibu
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Does not fit with power glide transmission.

  • Year / Make / Model 1970-1975 Chevrolet Monte Carlo
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Does not fit with power glide transmission.

  • Year / Make / Model 1970-1972 Chevrolet Monte Carlo
    Engine Type V8
    Engine Size(s)
    • 402 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Does not fit with power glide transmission.

  • Year / Make / Model 1968-1969 GMC C15/C1500 Pickup
    Engine Type V8
    Engine Size(s)
    • 396 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1970-1972 GMC C15/C1500 Pickup
    Engine Type V8
    Engine Size(s)
    • 402 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1973-1974 GMC C15/C1500 Pickup
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1968-1969 GMC C15/C1500 Suburban
    Engine Type V8
    Engine Size(s)
    • 396 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1970-1972 GMC C15/C1500 Suburban
    Engine Type V8
    Engine Size(s)
    • 402 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1973-1974 GMC C15/C1500 Suburban
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1968-1969 GMC C25/C2500 Pickup
    Engine Type V8
    Engine Size(s)
    • 396 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1970-1972 GMC C25/C2500 Pickup
    Engine Type V8
    Engine Size(s)
    • 402 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1973-1974 GMC C25/C2500 Pickup
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1968-1969 GMC C25/C2500 Suburban
    Engine Type V8
    Engine Size(s)
    • 396 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1970-1972 GMC C25/C2500 Suburban
    Engine Type V8
    Engine Size(s)
    • 402 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1973-1974 GMC C25/C2500 Suburban
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1975-1978 GMC C15
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1975-1978 GMC C15 Suburban
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1975-1978 GMC C25
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1975-1978 GMC C25 Suburban
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1971-1975 GMC Sprint
    Engine Type V8
    Engine Size(s)
    • 454 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1971-1972 GMC Sprint
    Engine Type V8
    Engine Size(s)
    • 402 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1974-1975 GMC Sprint
    Engine Type V8
    Engine Size(s)
    • 402 Cubic Inches
    Notes
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • This long tube header has excellent ground clearance with collector above the bottom of the frame rails.
  • ,
  • Will work with 4L60E and 4L80E transmissions.

  • Year / Make / Model 1967-1981 Pontiac Firebird
    Engine Type V8
    Notes
  • Big Block Chevrolet Swap 396-502
  • ,
  • Mid Length Design for Maximum Ground Clearance.
  • ,
  • Will not fit with Factory Saginaw 800 power steering box.
  • ,
  • Not recommended for Gen-6 502cid engines with aluminum heads.
  • ,
  • Fits with manual and auto trans floor shifts only.
  • ,
  • Big block frame stands and motor mounts required for proper fit.
  • ,
  • Will fit OE Suspension & Detroit Speed & Engineering front subframes.

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