Doug's Headers D670A4 1 3/4" 4-Tube Full Length Header Ford Mustang 351C 67-70 Metallic Ceramic Coating

Doug's Headers D670A4 1 3/4" 4-Tube Full Length Header Ford Mustang 351C 67-70 Metallic Ceramic Coating

Part Number: D670A4
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Features & Benefits

  • 3/8" Thick machined flanges to prevent warping
  • Precision formed long transition collectors and long tube design reduces backpressure and increases higher RPM horsepower
  • Heavy duty 16-gauge tubing for long life
  • Tubes are pre-polished to removed scratches before applying metallic ceramic or hi-temp black coating

Long tube headers provide the greatest increases in horsepower and torque across the entire RPM spectrum. The choice of racers worldwide, Doug's long tube headers are designed for the car owner who wants maximum power and the highest quality header on the market.


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 Metallic Ceramic Coated
Material Steel
Design Full-length
Primary Tubing Diameter 1.75 Inches
Collector Port Diameter 2.5 Inches
Port Shape SAP
Tube Wall Thickness 16 Gauge
Flange Thickness 0.375 Inches
Collector Attachment 3-Bolt Flange
Oxygen Sensor Port No
Gasket Or Seal Included Yes
Mounting Hardware Included Yes
Grade Type Performance
Color Silver
Sheen Level Semi-Gloss

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.

  • Once an item has tracking info, it cannot be cancelled. If you decide you don’t want the items after shipment, please take receipt of the item and process it via our return policy. Thank you for understanding!

Returns, Replacements & Warranty

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.

Warranty

All Doug's headers and exhaust products are guaranteed, to the original purchaser, to be free of defects in materials and workmanship for one year. This warranty covers the replacement or repair of the product only and does not cover the cost of removal and installation, customer applied aftermarket coatings or any other discoloration or corrosion of finished surfaces. Damage or product failure resulting from collision,improper installation, off-road use, road hazards, the use of exhaust insulting wrap or like products or rust occurring after installation, is not covered by the warranty. Should a part become defective it should be returned to the original selling retailer and must be accompanied with the original sales receipt. If there is no retailer in your area, call the factory for a return authorization and return your part prepaid to the factory for inspection. PerTronix reserves the right to replace or repair the alleged defective part and return the part freight collect.

Reviews

Doug's Headers D670A4 1 3/4" 4-Tube Full Length Header Ford Mustang 351C 67-70 Metallic Ceramic Coating

Doug's Headers D670A4 1 3/4" 4-Tube Full Length Header Ford Mustang 351C 67-70 Metallic Ceramic Coating

Part Number: D670A4
Regular price $986.45
Sale price $986.45 Regular price

Part Number: D670A4

$100 MAIL-IN REBATE Learn more

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Product details

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

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Features & Benefits

  • 3/8" Thick machined flanges to prevent warping
  • Precision formed long transition collectors and long tube design reduces backpressure and increases higher RPM horsepower
  • Heavy duty 16-gauge tubing for long life
  • Tubes are pre-polished to removed scratches before applying metallic ceramic or hi-temp black coating

Long tube headers provide the greatest increases in horsepower and torque across the entire RPM spectrum. The choice of racers worldwide, Doug's long tube headers are designed for the car owner who wants maximum power and the highest quality header on the market.


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 Metallic Ceramic Coated
Material Steel
Design Full-length
Primary Tubing Diameter 1.75 Inches
Collector Port Diameter 2.5 Inches
Port Shape SAP
Tube Wall Thickness 16 Gauge
Flange Thickness 0.375 Inches
Collector Attachment 3-Bolt Flange
Oxygen Sensor Port No
Gasket Or Seal Included Yes
Mounting Hardware Included Yes
Grade Type Performance
Color Silver
Sheen Level Semi-Gloss

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.

  • Once an item has tracking info, it cannot be cancelled. If you decide you don’t want the items after shipment, please take receipt of the item and process it via our return policy. Thank you for understanding!

Returns, Replacements & Warranty

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.

Warranty

All Doug's headers and exhaust products are guaranteed, to the original purchaser, to be free of defects in materials and workmanship for one year. This warranty covers the replacement or repair of the product only and does not cover the cost of removal and installation, customer applied aftermarket coatings or any other discoloration or corrosion of finished surfaces. Damage or product failure resulting from collision,improper installation, off-road use, road hazards, the use of exhaust insulting wrap or like products or rust occurring after installation, is not covered by the warranty. Should a part become defective it should be returned to the original selling retailer and must be accompanied with the original sales receipt. If there is no retailer in your area, call the factory for a return authorization and return your part prepaid to the factory for inspection. PerTronix reserves the right to replace or repair the alleged defective part and return the part freight collect.

Reviews

Applications

Year / Make / Model 1970 Ford Fairlane
Engine Type V8
Engine Size(s) Cubic Inches: 351
Notes
  • Automatic Transmission Only.
  • Power Steering Cars require power steering bracket PN H7609.
  • Fits four barrel heads, 351C 4V.

Year / Make / Model 1967-1970 Ford Mustang
Engine Type V8
Notes
  • For use with 351C 4V Engine Swap.
  • Power Steering Cars require power steering bracket PN H7609.

Year / Make / Model 1970 Ford Mustang
Engine Type V8
Engine Size(s) Cubic Inches: 351
Notes
  • 351C 4V Heads
  • Power Steering Cars require power steering bracket PN H7609.

Year / Make / Model 1970-1971 Ford Ranchero
Engine Type V8
Engine Size(s) Cubic Inches: 351
Notes
  • Fits four barrel heads, 351C 4V, Boss 351.
  • Power Steering Cars require power steering bracket PN H7609.

Year / Make / Model 1970-1971 Ford Torino
Engine Type V8
Engine Size(s) Cubic Inches: 351
Notes
  • Fits four barrel heads, 351C 4V, Boss 351.
  • Power Steering Cars require power steering bracket PN H7609.

Year / Make / Model 1970-1971 Mercury Cougar
Engine Type V8
Engine Size(s) Cubic Inches: 351
Notes
  • Fits four barrel heads, 351C 4V, Boss 351.
  • Power Steering Cars require power steering bracket PN H7609.

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