1964-70 Ford Mustang/Mercury Cougar Small Block Auto Transmission 1 5/8" 304 Stainless Steel Long Tube Header

Emissions code 2 Emissions Code
Part Number: D690YA-SS In Stock
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Regular price $1,015.75
Sale price $1,015.75 Regular price Save %
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Free shipping on orders over $100 in contiguous 48 states.

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Reliable Quality

Products built to last for enduring performance.

Features & Benefits

Highlights

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.

  • 3/8” thick 304 stainless machined flanges to prevent warping
  • CNC 304 stainless mandrel bent tubes for an accurate fit and improved flow
  • Precision formed long transition collectors and long tube design reduce backpressure and increase higher RPM horsepower
  • Durable 16 gauge tubing
  • 1 5/8" Primary Tubing Diameter
  • 2.5" Collector Port Diameter
  • Same as Port Port Shape
  • 304 Stainless Steel
Why pick Doug's 304 Stainless Steel?

Naturally resistant to rust and corrosion, 304 stainless stands up to heat and the elements without the need for additional coatings. The durable construction maintains its strength and appearance over time, while the sleek finish adds a performance-driven style under the hood. It’s a reliable, long-term solution for enthusiasts who want both function and form.

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Specifications

Finish 304 Stainless Steel
Material 304 Stainless Steel
Design Full-length
Primary Tubing Diameter 1.625 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
Sheen Level Satin

Exhaust Header Dimensions

A - Left 4 1/2"
A - Right 4"
B - Left 15"
B - Right 15"
C - Left 29"
C - Right 31 1/2"

Installation instructions

Instruction Manual
Installation Instructions
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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 - 108.99 $7.49 flat rate
UPS Ground $109+ 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!

 

Shipping Dock Hours of Operations

7:00am to 4:00pm CST Monday-Friday

Receiving Dock Numbers: 7 and 8

Shipping Dock Numbers: 13, 14, and 15

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

Fitment

Vehicles

Year / Make / Model Engine Type Engine Size(s) Notes
1964-1968 Ford Mustang V8 Cubic Inches: 289
  • 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.
1964-1965 Ford Mustang V8 Cubic Inches: 260
  • 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.
1968-1970 Ford Mustang V8 Cubic Inches: 302
  • 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.
1967-1968 Mercury Cougar V8 Cubic Inches: 289
  • 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.
1968-1970 Mercury Cougar V8 Cubic Inches: 302
  • 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.

Always Read All Product Page Details For More Important Fitment Information

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