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Doug's Headers D450-B Full Length Header, 1-5/8 In, 63-66 Mopar, Blk

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#447D450B

Doug's Headers D450-B Full Length Header, 1-5/8 In, 63-66 Mopar, Blk

Name: Doug's Headers D450-B Full Length Header, 1-5/8 In, 63-66 Mopar, Blk
Brand: Doug's Headers
SKU: 447D450B
Price: 1204.07 USD
Availability: InStock

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$1,204.07

/set

Factory Shipped

$1,324.48

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Product Summary

Long Tube Header Tube Type, Standard Flange Style

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Key Specs

MFG. Part #	D450-B
Header Tube Type	Long Tube
Flange Style	Standard
Primary Tube Diameter	1-5/8"
Material Type	Steel

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Doug's Headers D450-B Details

Doug's PASSENGER CAR HEADERS Long Tube Hi-Temp Black 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.

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 Hi-Temp Black Coating

Doug's Headers D450-B 1 5/8" 4-Tube Full Length Header Mopar Dart Small Block Mopar 63-66 Hi-Temp Black Coating
Black
Collector: 2 1/2
Port Shape: SAP
Primary Tube: 1 5/8
emissions code: legal only for off-highway use (except in California or states that have adopted California emission standards)
Fits with Mopar mini-starter part PN P5249644AB
with Floor Shifter
with A/C

Doug's Headers D450-B 1 5/8" 4-Tube Full Length Header Mopar Dart Small Block Mopar 63-66 Hi-Temp Black Coating
Black
Collector: 2 1/2
Port Shape: SAP
Primary Tube: 1 5/8
emissions code: legal only for off-highway use (except in California or states that have adopted California emission standards)
Fits with Mopar mini-starter part PN P5249644AB
with Floor Shifter
with A/C

Application

1964-1966 Dodge Dart 4.5L/273 V8
1966 Dodge Dart 5.2L/318 V8
1964-1966 Plymouth Barracuda 4.5L/273 V8
1966 Plymouth Barracuda 5.2L/318 V8
1964-1966 Plymouth Valiant 4.5L/273 V8

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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

Headers Installation Instructions (447D450B)

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 D450-B Specifications

KEY SPECS
MFG. Part #	D450-B
Brand	Doug's Headers
Header Tube Type	Long Tube
Flange Style	Standard
Primary Tube Diameter	1-5/8"
Material Type	Steel
Color	Black
Weld-Up	No
Collector Diameter	2-1/2 Inch
Finish	Hi-Temp Black
Hardware Included	Yes
Gasket(s) Included	Yes

GENERAL
Sold in Quantity	Pair
GTIN Code	694342543501

Ratings & Reviews

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Fitment

1964 Dodge 330

273 Mopar

1964 Dodge 440

273 Mopar

1964 Dodge 880

273 Mopar

1964-1966 Dodge A100

273 Mopar

1967-1970 Dodge A100 Pickup

273 Mopar

1964-1967 Dodge A100 Truck

273 Mopar

1966-1967 Dodge Charger

273 Mopar

1965-1968 Dodge Coronet

273 Mopar

1964-1965 Dodge Custom

273 Mopar

1964-1969 Dodge Dart

273 Mopar

1964-1967 Dodge Polara

273 Mopar

1964-1968 Plymouth Barracuda

273 Mopar

1964-1968 Plymouth Belvedere

273 Mopar

1965-1967 Plymouth Belvedere II

273 Mopar

1964-1965 Plymouth Fury

273 Mopar

1965 Plymouth Fury II

273 Mopar

1965 Plymouth Fury III

273 Mopar

1967 Plymouth GTX

273 Mopar

1965-1968 Plymouth Satellite

273 Mopar

1964 Plymouth Savoy

273 Mopar

1964-1969 Plymouth Valiant

273 Mopar