Doug's Headers - D690YA

Doug's Headers D690YA 1 5/8" Tri-Y Header Ford Mustang Small Block Ford 64-70 Metallic Ceramic Coating

Doug's Headers D690YA 1 5/8" Tri-Y Header Ford Mustang Small Block Ford 64-70 Metallic Ceramic Coating

Part Number: D690YA / UPC 694342510848
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Features & Benefits

  • 3/8" thick machined flanges to prevent warping
  • CNC mandrel bent tubes ensure accurate fit and better flow
  • Heavy 16-guage tubing for longer life
  • Tubes are pre-polished to removed scratches before applying metallic ceramic or hi-temp black coating

Doug's is the pioneering force behind the popular TRI-Y design for cars and trucks. The unique, shortend, paired primary tubes increase mid-range torque without sacrificing top end power. TRI-Y's are a great choice for daily drivers and heavy duty trucks looking to increase power from idle up to 4500 RPM while maintaining maximum fuel efficiency.


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 1.625 IN
Collector Port Diameter 2.5 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
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.

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 - D690YA

Doug's Headers D690YA 1 5/8" Tri-Y Header Ford Mustang Small Block Ford 64-70 Metallic Ceramic Coating

Doug's Headers D690YA 1 5/8" Tri-Y Header Ford Mustang Small Block Ford 64-70 Metallic Ceramic Coating

Part Number: D690YA / UPC 694342510848
Regular price $899.95
Sale price $899.95 Regular price

Part Number: D690YA / UPC 694342510848
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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
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Features & Benefits

  • 3/8" thick machined flanges to prevent warping
  • CNC mandrel bent tubes ensure accurate fit and better flow
  • Heavy 16-guage tubing for longer life
  • Tubes are pre-polished to removed scratches before applying metallic ceramic or hi-temp black coating

Doug's is the pioneering force behind the popular TRI-Y design for cars and trucks. The unique, shortend, paired primary tubes increase mid-range torque without sacrificing top end power. TRI-Y's are a great choice for daily drivers and heavy duty trucks looking to increase power from idle up to 4500 RPM while maintaining maximum fuel efficiency.


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 1.625 IN
Collector Port Diameter 2.5 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
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.

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 1964-1968 Ford Mustang
Engine Type V8
Engine Size(s) Cubic Inches: 289
Notes
  • Does not fit with C6 Transmission
  • On Power Steering Cars, Installation requires power steering bracket PN H7609.
  • Vehicles with Air Injection heads will require grinding of the header flange to fit.
  • Tri Y design.
  • Use recommended C5ZZ16A052E export brace if shock mount center to center dimension is less than 33 3/4
  • Will not fit GT40 P heads.

Year / Make / Model 1964-1965 Ford Mustang
Engine Type V8
Engine Size(s) Cubic Inches: 260
Notes
  • Does not fit with C6 Transmission
  • On Power Steering Cars, Installation requires power steering bracket PN H7609.
  • Vehicles with Air Injection heads will require grinding of the header flange to fit.
  • Tri Y design.
  • Use recommended C5ZZ16A052E export brace if shock mount center to center dimension is less than 33 3/4
  • Will not fit GT40 P heads.

Year / Make / Model 1968-1970 Ford Mustang
Engine Type V8
Engine Size(s) Cubic Inches: 302
Notes
  • Does not fit with C6 Transmission
  • On Power Steering Cars, Installation requires power steering bracket PN H7609.
  • Vehicles with Air Injection heads will require grinding of the header flange to fit.
  • Tri Y design.
  • Use recommended C5ZZ16A052E export brace if shock mount center to center dimension is less than 33 3/4
  • Will not fit GT40 P heads.

Year / Make / Model 1967-1968 Mercury Cougar
Engine Type V8
Engine Size(s) Cubic Inches: 289
Notes
  • Does not fit with C6 Transmission
  • On Power Steering Cars, Installation requires power steering bracket PN H7609.
  • Vehicles with Air Injection heads will require grinding of the header flange to fit.
  • Tri Y design.
  • Use recommended C5ZZ16A052E export brace if shock mount center to center dimension is less than 33 3/4
  • Will not fit GT40 P heads.

Year / Make / Model 1968-1970 Mercury Cougar
Engine Type V8
Engine Size(s) Cubic Inches: 302
Notes
  • Does not fit with C6 Transmission
  • On Power Steering Cars, Installation requires power steering bracket PN H7609.
  • Vehicles with Air Injection heads will require grinding of the header flange to fit.
  • Tri Y design.
  • Use recommended C5ZZ16A052E export brace if shock mount center to center dimension is less than 33 3/4
  • Will not fit GT40 P heads.

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