$234 Off

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

$234 Off

#447D590

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

Name: Doug's Headers D590 Full Length Header, 1-3/4 In, 68-72 GTO, CC
Brand: Doug's Headers
SKU: 447D590
Price: 1052.04 USD
Availability: InStock

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$1,052.04

/set

Factory Shipped

$1,285.82

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Product Summary

Long Tube Header Tube Type, D-port Exhaust Port Shape

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Key Specs

MFG. Part #	D590
Header Tube Type	Long Tube
Exhaust Port Shape	D-port
Flange Style	Standard
Primary Tube Diameter	1-3/4"

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Need To Know

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855.313.9176

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Doug's Headers D590 Details

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

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

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

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

Charts

Installation Instructions (PDF)

Guides & Documents

Choosing the Right Headers

Headers Installation Instructions (447D590)

CARB Warning

For use on pre-1966 vehicles only

Emissions warning: this part only legal for sale or use in California if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. ++any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering there are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

CA Prop 65

CARB warning

Doug's Headers D590 Specifications

KEY SPECS
MFG. Part #	D590
Brand	Doug's Headers
Header Tube Type	Long Tube
Exhaust Port Shape	D-port
Flange Style	Standard
Primary Tube Diameter	1-3/4"
Material Type	Steel
Color	Silver
Weld-Up	No
Collector Diameter	3 Inch
Finish	Ceramic Coated
Hardware Included	Yes
Gasket(s) Included	Yes

GENERAL
Sold in Quantity	Pair
GTIN Code	694342509903

Ratings & Reviews

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Fitment

1967-1969 Pontiac Bonneville

400 Pontiac V8
428 Pontiac V8

1970-1974 Pontiac Bonneville

350 Pontiac V8
400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1975-1976 Pontiac Bonneville

400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1977 Pontiac Bonneville

350 Pontiac V8
400 Pontiac V8

1978 Pontiac Bonneville

400 Pontiac V8

1967-1969 Pontiac Catalina

400 Pontiac V8
428 Pontiac V8

1970-1974 Pontiac Catalina

350 Pontiac V8
400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1975 Pontiac Catalina

400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1976 Pontiac Catalina

350 Pontiac V8
400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1977 Pontiac Catalina

350 Pontiac V8
400 Pontiac V8

1978 Pontiac Catalina

400 Pontiac V8

1967 Pontiac Executive

400 Pontiac V8
428 Pontiac V8

1968 Pontiac Executive

350 Pontiac V8
400 Pontiac V8
428 Pontiac V8

1969 Pontiac Executive

400 Pontiac V8
428 Pontiac V8

1970 Pontiac Executive

350 Pontiac V8
400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1967 Pontiac Firebird

400 Pontiac V8

1968-1969 Pontiac Firebird

350 Pontiac V8
400 Pontiac V8

1970-1976 Pontiac Firebird

350 Pontiac V8
400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1977 Pontiac Firebird

350 Pontiac V8
400 Pontiac V8

1978-1979 Pontiac Firebird

400 Pontiac V8

1973-1975 Pontiac Grand Am

350 Pontiac V8
400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1975-1976 Pontiac Grand LeMans

350 Pontiac V8
400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1977 Pontiac Grand LeMans

350 Pontiac V8
400 Pontiac V8

1967-1969 Pontiac Grand Prix

400 Pontiac V8
428 Pontiac V8

1970 Pontiac Grand Prix

350 Pontiac V8
400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1971 Pontiac Grand Prix

400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1972-1974 Pontiac Grand Prix

350 Pontiac V8
400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1975 Pontiac Grand Prix

400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1976 Pontiac Grand Prix

350 Pontiac V8
400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1977 Pontiac Grand Prix

350 Pontiac V8
400 Pontiac V8

1971-1974 Pontiac Grand Safari

350 Pontiac V8
400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1975-1976 Pontiac Grand Safari

400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1977 Pontiac Grand Safari

350 Pontiac V8
400 Pontiac V8

1978 Pontiac Grand Safari

400 Pontiac V8

1971 Pontiac Grandville

Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1972-1975 Pontiac Grandville

400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1967-1969 Pontiac GTO

400 Pontiac V8

1970-1971 Pontiac GTO

400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1972-1973 Pontiac GTO

350 Pontiac V8
400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1967 Pontiac LeMans

400 Pontiac V8
428 Pontiac V8

1968-1969 Pontiac LeMans

350 Pontiac V8
400 Pontiac V8
428 Pontiac V8

1970-1974 Pontiac LeMans

350 Pontiac V8
400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1975 Pontiac LeMans

350 Pontiac V8
400 Pontiac V8

1976 Pontiac LeMans

350 Pontiac V8
400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1977 Pontiac LeMans

350 Pontiac V8
400 Pontiac V8

1977 Pontiac Phoenix

350 Pontiac V8

1967 Pontiac Tempest

400 Pontiac V8
428 Pontiac V8

1968-1969 Pontiac Tempest

350 Pontiac V8
400 Pontiac V8
428 Pontiac V8

1970 Pontiac Tempest

350 Pontiac V8
400 Pontiac V8
Pontiac V8 Large-Journal 455
Pontiac V8 Small-Journal 455 Ram Air V

1971-1977 Pontiac Ventura

350 Pontiac V8