Doug's Headers Tri-Y 260/289/302 1-5/8"-2" Stepped Design Ceramic Coated 1965-1970

Dougs Headers:
100% of 100


  • 1-5/8" To 2" Stepped Design
  • Tri-Y Style Headers
  • Fits 260/289/302 Engines
  • 2.5" Collectors
MSRP $1,036.70
You save 9%

Doug's Headers Ceramic 1-5/8"-2" Stepped Design Tri-Y Headers for all 1965, 1966, 1967, 1968, 1969 and 1970 Mustangs with a Manual Transmission and a 260, 289 or 302 Engine.

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.

*Installation may require the use of a Non-HiPo 1965-1966 equalizer bar.
*These headers have 1-5/8" to 2" primaries that go into 2.5" collectors.

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

*1965-1968 Mustangs equipped with power steering require a slave cylinder lowering bracket (SCB).

Metallic Ceramic Thermal Barrier Coating (MCTBC) is simply the best header finish on the market and comes standard on all Doug's headers. 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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