Doug's Headers - D665-B

Doug's Headers D665-B 1 5/8" 4-Tube Shorty Header Ford Mustang Small Block Ford 64-73 Hi-Temp Black Coating

Doug's Headers D665-B 1 5/8" 4-Tube Shorty Header Ford Mustang Small Block Ford 64-73 Hi-Temp Black Coating

Part Number: D665-B / UPC 694342544232
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Features & Benefits

  • 3/8" Thick machined flanges to prevent warping
  • CNC mandrel bent tubes for ensuring accurate fit and optimal flow
  • Heavy duty 16-gauge tubing for long life
  • Tubes are pre-polished to removed scratches before applying metallic ceramic or hi-temp black coating

Mid-Length Headers, often called Clipsters, are engineered to provide superior performance gains over Manifold Replacements or Block Hugger style headers. These headers enhance your vehicles's horsepower and torque while preserving ground clearance for cars with a lowered stance and trucks where long tube headers may hang to low.


For the enthusiast who demands the best, Doug's Headers are not just components; they're a statement of excellence, a commitment to leading-edge performance, and a nod to the glory days of muscle cars and drag racing. Join the ranks of champions. Experience the unmatched quality and performance of Doug's Headers today.

Specifications

Finish Hi-Temp Black Coating
Material Steel
Design Mid Length
Primary Tubing Diameter 1.625 IN
Collector Port Diameter 3.0 IN
Port Shape SAP
Tube Wall Thickness 16 Gauge
Flange Thickness 0.375 IN
Collector Attachment 3-Bolt Flange
EGT Port No
Oxygen Sensor Port No
Gasket Or Seal Included Yes
Mounting Hardware Included Yes
Color Black
Sheen Level Matte

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 - D665-B

Doug's Headers D665-B 1 5/8" 4-Tube Shorty Header Ford Mustang Small Block Ford 64-73 Hi-Temp Black Coating

Doug's Headers D665-B 1 5/8" 4-Tube Shorty Header Ford Mustang Small Block Ford 64-73 Hi-Temp Black Coating

Part Number: D665-B / UPC 694342544232
Regular price $750.95
Sale price $750.95 Regular price

Part Number: D665-B / UPC 694342544232
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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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Features & Benefits

  • 3/8" Thick machined flanges to prevent warping
  • CNC mandrel bent tubes for ensuring accurate fit and optimal flow
  • Heavy duty 16-gauge tubing for long life
  • Tubes are pre-polished to removed scratches before applying metallic ceramic or hi-temp black coating

Mid-Length Headers, often called Clipsters, are engineered to provide superior performance gains over Manifold Replacements or Block Hugger style headers. These headers enhance your vehicles's horsepower and torque while preserving ground clearance for cars with a lowered stance and trucks where long tube headers may hang to low.


For the enthusiast who demands the best, Doug's Headers are not just components; they're a statement of excellence, a commitment to leading-edge performance, and a nod to the glory days of muscle cars and drag racing. Join the ranks of champions. Experience the unmatched quality and performance of Doug's Headers today.

Specifications

Finish Hi-Temp Black Coating
Material Steel
Design Mid Length
Primary Tubing Diameter 1.625 IN
Collector Port Diameter 3.0 IN
Port Shape SAP
Tube Wall Thickness 16 Gauge
Flange Thickness 0.375 IN
Collector Attachment 3-Bolt Flange
EGT Port No
Oxygen Sensor Port No
Gasket Or Seal Included Yes
Mounting Hardware Included Yes
Color Black
Sheen Level Matte

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 1966-1967 Ford Fairlane
Engine Type V8
Engine Size(s) Liters: 4.7
Cubic Inches: 289
Notes
  • Will not fit GT40 P heads.

Year / Make / Model 1968-1970 Ford Fairlane
Engine Type V8
Engine Size(s) Liters: 5.0
Cubic Inches: 302
Notes
  • Will not fit GT40 P heads.

Year / Make / Model 1966-1968 Ford Falcon
Engine Type V8
Engine Size(s) Liters: 4.7
Cubic Inches: 289
Notes
  • Will not fit GT40 P heads.

Year / Make / Model 1968-1970 Ford Falcon
Engine Type V8
Engine Size(s) Liters: 5.0
Cubic Inches: 302
Notes
  • Will not fit GT40 P heads.

Year / Make / Model 1970-1977 Ford Maverick
Engine Type V8
Engine Size(s) Liters: 5.0
Cubic Inches: 302
Notes
  • Will not fit GT40 P heads.

Year / Make / Model 1971-1977 Ford Maverick
Engine Type V8
Engine Size(s) Liters: 4.7
Cubic Inches: 289
Notes
  • Will not fit GT40 P heads.

Year / Make / Model 1964-1968 Ford Mustang
Engine Type V8
Engine Size(s) Liters: 4.7
Cubic Inches: 289
Notes
  • Must use 66 1/2 or later motor mount frame brackets (approx. 1 higher than 65/early 66 style)
  • Will not fit GT40 P heads.

Year / Make / Model 1964-1965 Ford Mustang
Engine Type V8
Engine Size(s) Liters: 4.3
Cubic Inches: 260
Notes
  • Must use 66 1/2 or later motor mount frame brackets (approx. 1 higher than 65/early 66 style)
  • Will not fit GT40 P heads.

Year / Make / Model 1968-1973 Ford Mustang
Engine Type V8
Engine Size(s) Liters: 5.0
Cubic Inches: 302
Notes
  • Will not fit GT40 P heads.

Year / Make / Model 1966-1967 Ford Ranchero
Engine Type V8
Engine Size(s) Liters: 4.7
Cubic Inches: 289
Notes
  • Will not fit GT40 P heads.

Year / Make / Model 1968-1974 Ford Ranchero
Engine Type V8
Engine Size(s) Liters: 5.0
Cubic Inches: 302
Notes
  • Will not fit GT40 P heads.

Year / Make / Model 1968-1974 Ford Torino
Engine Type V8
Engine Size(s) Liters: 5.0
Cubic Inches: 302
Notes
  • Will not fit GT40 P heads.

Year / Make / Model 1966-1968 Mercury Comet
Engine Type V8
Engine Size(s) Liters: 4.7
Cubic Inches: 289
Notes
  • Will not fit GT40 P heads.

Year / Make / Model 1968-1969 Mercury Comet
Engine Type V8
Engine Size(s) Liters: 5.0
Cubic Inches: 302
Notes
  • Will not fit GT40 P heads.

Year / Make / Model 1967-1968 Mercury Cougar
Engine Type V8
Engine Size(s) Liters: 4.7
Cubic Inches: 289
Notes
  • Will not fit GT40 P heads.

Year / Make / Model 1968-1970 Mercury Cougar
Engine Type V8
Engine Size(s) Liters: 5.0
Cubic Inches: 302
Notes
  • Will not fit GT40 P heads.

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