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Doug's Headers D103 Full Length Header, 1-3/4"", 68-79 Javelin

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#447D103

Doug's Headers D103 Full Length Header, 1-3/4"", 68-79 Javelin

Name: Doug's Headers D103 Full Length Header, 1-3/4"", 68-79 Javelin
Brand: Doug's Headers
SKU: 447D103
Price: 1056.37 USD
Availability: InStock

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$1,056.37

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$1,162.01

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Product Summary

Long Tube Header Tube Type, Standard Flange Style

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Key Specs

MFG. Part #	D103
Header Tube Type	Long Tube
Flange Style	Standard
Primary Tube Diameter	1-3/4"
Material Type	Steel

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855.313.9176

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Doug's Headers D103 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 D103 1 3/4" 4-Tube Full Length Header AMC Javelin V8 68-79 Metallic Ceramic Coating
Ceramic Coated
Collector: 3
Port Shape: SAP
Primary Tube: 1 3/4
Dog leg exhaust port
emissions code: legal only for off-highway use (except in California or states that have adopted California emission standards)
with: No A/C

Doug's Headers D103 1 3/4" 4-Tube Full Length Header AMC Javelin V8 68-79 Metallic Ceramic Coating
Ceramic Coated
Collector: 3
Port Shape: SAP
Primary Tube: 1 3/4
Dog leg exhaust port
emissions code: legal only for off-highway use (except in California or states that have adopted California emission standards)
with: No A/C

Application

1968-1969 American Motors AMX 4.7L/290 V8
1968-1969 American Motors AMX 5.6L/343 V8
1970 American Motors AMX 5.9L/360 V8
1970-1979 American Motors AMX 5L/304 V8
1968-1970 American Motors AMX 6.4L/390 V8
1968-1969 American Motors Javelin 4.7L/290 V8
1968-1969 American Motors Javelin 5.6L/343 V8
1970-1974 American Motors Javelin 5.9L/360 V8
1970-1974 American Motors Javelin 5L/304 V8
1968-1970 American Motors Javelin 6.4L/390 V8
1971-1974 American Motors Javelin 6.6L/401 V8

Charts

Installation Instructions (PDF)

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Aeromotive & PerTronix Black Friday 10% Off Sale

Black Friday Savings Are Here! From November 1 2026 through November 30 2026, save 10% on all Aeromotive and PerTronix products, including top performance brands like Doug's Headers, Taylor Cable, and JBA Performance Exhaust. Whether you're upgrading your fuel system, ignition components, headers, spark plug wires, or exhaust setup, this limited-time offer makes it easy to get premium performance parts at a great price. No coupon required, just shop qualifying Aeromotive and PerTronix brands and enjoy instant savings all month long.

Guides & Documents

Choosing the Right Headers

Headers Installation Instructions (447D103)

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 WARNING:

Can expose you to lead, a carcinogen and reproductive toxicant. See www.P65Warnings.ca.gov

CARB warning

Doug's Headers D103 Specifications

KEY SPECS
MFG. Part #	D103
Brand	Doug's Headers
Header Tube Type	Long Tube
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	694342506742

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Fitment

1967-1969 AMC Ambassador

290 AMC V8
343 AMC V8

1970 AMC Ambassador

304 AMC V8
360 AMC V8

1971-1974 AMC Ambassador

304 AMC V8
360 AMC V8
401 AMC V8

1966 AMC American

290 AMC V8

1967-1968 AMC American

290 AMC V8
343 AMC V8

1968-1969 AMC AMX

290 AMC V8
343 AMC V8

1970 AMC AMX

304 AMC V8
360 AMC V8

1978-1979 AMC AMX

304 AMC V8

1980 AMC AMX

290 AMC V8

1966 AMC Classic

290 AMC V8

1978-1979 AMC Concord

304 AMC V8

1972-1976 AMC Gremlin

304 AMC V8

1970 AMC Hornet

304 AMC V8

1971-1974 AMC Hornet

304 AMC V8
360 AMC V8

1975-1977 AMC Hornet

304 AMC V8

1968-1969 AMC Javelin

290 AMC V8
343 AMC V8

1970 AMC Javelin

304 AMC V8
360 AMC V8

1971-1974 AMC Javelin

304 AMC V8
360 AMC V8
401 AMC V8

1967 AMC Marlin

290 AMC V8
343 AMC V8

1971-1976 AMC Matador

304 AMC V8
360 AMC V8
401 AMC V8

1977 AMC Matador

304 AMC V8
360 AMC V8

1978 AMC Matador

360 AMC V8

1978-1979 AMC Pacer

304 AMC V8

1969 AMC Rambler

290 AMC V8
343 AMC V8

1967-1969 AMC Rebel

290 AMC V8
343 AMC V8

1970 AMC Rebel

304 AMC V8
360 AMC V8

1966 AMC Rogue

290 AMC V8

1979 AMC Spirit

304 AMC V8

1959-1966 Jeep CJ3

304 AMC V8

1959-1979 Jeep CJ5

304 AMC V8

1966-1968 Jeep CJ5A

304 AMC V8

1959-1975 Jeep CJ6

304 AMC V8

1966-1968 Jeep CJ6A

304 AMC V8

1976-1979 Jeep CJ7

304 AMC V8

1985-1986 Jeep CJ7

304 AMC V8

1973 Jeep Commando

304 AMC V8

1962-1969 Jeep Gladiator

401 AMC V8

1984-1991 Jeep Grand Wagoneer

360 AMC V8

1993 Jeep Grand Wagoneer

360 AMC V8

1963-1973 Jeep J-100

304 AMC V8

1963-1965 Jeep J-200

304 AMC V8

1963-1965 Jeep J-210

304 AMC V8

1963-1965 Jeep J-220

304 AMC V8

1963-1965 Jeep J-230

304 AMC V8

1963-1973 Jeep J-2500

304 AMC V8

1965-1973 Jeep J-2600

304 AMC V8

1965-1970 Jeep J-2700

304 AMC V8

1965-1968 Jeep J-2800

304 AMC V8

1963-1965 Jeep J-300

304 AMC V8

1963-1965 Jeep J-310

304 AMC V8

1963-1965 Jeep J-320

304 AMC V8

1963-1965 Jeep J-330

304 AMC V8

1965-1970 Jeep J-3500

304 AMC V8

1965-1970 Jeep J-3600

304 AMC V8

1965-1970 Jeep J-3700

304 AMC V8

1965-1971 Jeep J-3800

304 AMC V8

1970-1973 Jeep J-4500

304 AMC V8

1970-1973 Jeep J-4600

304 AMC V8

1970-1973 Jeep J-4700

304 AMC V8

1970-1973 Jeep J-4800

304 AMC V8

1974-1988 Jeep J10

304 AMC V8

1974-1988 Jeep J20

304 AMC V8

1966-1973 Jeep Jeepster

304 AMC V8

1970-1980 Jeep Wagoneer

360 AMC V8
401 AMC V8

1981-1990 Jeep Wagoneer

360 AMC V8