Doug's Headers Tri-Y Ceramic Coated Automatic Transmission 351W 1967-1970

Dougs Headers:
100% of 100


  • Ceramic Coated
  • Direct Fit
  • Tri Y Design
  • 3" Collector
MSRP $1,009.20
You save 9%

Doug's Headers 1-3/4"-2" Stepped Design Ceramic Tri-Y Headers for all 1967, 1968, 1969 and 1970 Mustangs with a 351W Engine.

These will not work with the original style clutch linkage on a manual transmission, you must upgrade to a clutch cable conversion. Every header from Doug's Headers 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 increase in horsepower and torque. Doug's Headers are carefully developed for the vehicles they are intended to fit and are re-checked numerous times during the design and manufacturing process.

*Tri-Y headers yield maximum power from off/idle to 4500 RPM, making them well suited for maximum mid-range torque.
*1965-1968 Mustangs equipped with power steering require a slave cylinder lowering bracket (SCB).

These Doug's Headers come with all the necessary mounting hardware, collector reducers, premium gaskets and detailed installation instruction sheets. The extra-thick gaskets are rated up to 1100F, pressures to 3700 psig (255 bar) and are designed for an exact port match with all Doug's Headers.

*These headers have 1-3/4" to 2" primaries that go into 3" collectors.

Metallic Ceramic Thermal Barrier Coating (MCTBC) is simply the best header finish on the market and comes standard on all Dougs Headers products. MCTBC protects and extends the life of headers by creating a thermal barrier that significantly lowers underhood temperatures and protects the substrate metal from thermal fatigue. After MCTBC is applied, it is polished with a vibratory finishing process that produces a high luster aluminum appearance. This coating is easy to maintain and will last for years under normal operating conditions. The polishing process compresses and activates the coating, which increases the surface hardness to produce a finish that is 60% more corrosion resistant than an unpolished surface.

California Residents: Proposition 65 Warning

Only for use on pre-pollution controlled vehicles: This product can be used on vehicles that were manufactured before emissions control regulations were imposed. Pre-pollution vehicles are defined as:

  • 1965 and older U.S. manufactured California certified vehicles
  • 1967 and older U.S. manufactured federally certified vehicles

Vehicle Fitment

This product will fit the following Mustang years:

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