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$759.64
Doug's Headers D590 Full Length Header, 1-3/4 In, 68-72 GTO, CC
Doug's Headers D590 Full Length Header, 1-3/4 In, 68-72 GTO, CC

Doug's Headers D590 Full Length Header, 1-3/4 In, 68-72 GTO, CC

350 Pontiac V8, 400 Pontiac V8, 428 Pontiac V8, 455 Pontiac V8, Full-length Header Tube Type

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Doug's Headers D590 Full Length Header, 1-3/4 In, 68-72 GTO, CC
Doug's Headers D590 Full Length Header, 1-3/4 In, 68-72 GTO, CC
Doug's Headers D590 Full Length Header, 1-3/4 In, 68-72 GTO, CC
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Doug's Headers D590 Full Length Header, 1-3/4 In, 68-72 GTO, CC
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We estimate this item will ship on or before May 5th.
Part # 447D590
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Details

Header Tube Type:
Full-length
Finish:
Ceramic Coated
Flange Style:
Standard
Primary Tube Diameter:
1-3/4"
Material Type:
Steel
Color:
Silver
Weld-Up:
No
Exhaust Port Shape:
D-port
MFG. Part #:
D590
Collector Diameter:
3 Inch
Hardware Included:
Yes
Gasket(s) Included:
Yes
Sold in Quantity:
Pair
GTIN Code:
694342509903

Info

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

Application

1968-1972 Pontiac GTO 6.6L/400 V8
1970-1972 Pontiac GTO 7.5L/455 V8
1968-1971 Pontiac LeMans 5.7L/350 V8
1968-1971 Pontiac LeMans 6.6L/400 V8
1970-1971 Pontiac LeMans 7.5L/455 V8
1968-1969 Pontiac LeMans 7L/428 V8
1968-1970 Pontiac Tempest 5.7L/350 V8
1968-1970 Pontiac Tempest 6.6L/400 V8
1968-1969 Pontiac Tempest 7L/428 V8

Notes

  • Doug's Headers D590 1 3/4" 4-Tube Full Length Header Pontiac GTO 326-455 68-72 Metallic Ceramic Coating
  • Ceramic Coated
  • Collector: 3
  • Port: D
  • Primary: 1 3/4
  • exc. states w/Calif. emission stds
  • removal or modification of locking steering column reqd
  • factory heads w/o end bolt holes and should be drilled and tapped for proper sealing.
  • with Floor Shifter
  • with A/C
  • For Off-Road Use Only

Charts

Installation Instructions (PDF)

Important Messages

  • This item ships directly from the manufacturer. It may take an additional 15 business days for Dougs Headers to ship this item.
  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
  • This item ships via Ground Shipping only. Expedited and Air shipping options are not available.
Some parts are not legal for use in California or other states with similar laws/regulations

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Videos & Articles
  • Watch our video on the ceramic coating process for Armor Hot Coating. Headers coated with Armor Hot Coating protect your car without sacrificing looks.
  • Maintaining your headers is an important part of any hot rod. Pat gives some tips and demonstrates how well Purple Metal Polish works for keeping your headers looking great.
  • Jeremy explains the different options of headers that Speedway Motors offers for Demolition Derby cars. Watch this video to see a variety of options and the benefits of certain headers.
  • Hooker headers are installed in a 1967 Pontiac Firebird for increased power and a boost in performance. See how to work through fitment of the steering box, clutch Z bar and starter.

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