Originally designed for the 67-68 factory Cobra Jet Super Stock racers like Hubert Platt, The original DOUG’S HEADERS D627 tuned long tube header, is specifically designed to fit 390-428 FE engines in the very confining engine compartment environments of the 1967-70 Mustangs.

 
       The D627 features two tubes that cross under the oil pan for improved fitment and better power. Re-released by Doug’s Headers, the D627 further strengthens the Doug’s brand as the leader in muscle car headers with a rich history dating back to 1958.

    These headers are built with 3/8” thick flanges at the cylinder head and 3 bolt outlet flanges. The 4 tube under chassis exit design is made from 16 gauge tubing for durability with large 2” primaries and 3 1/2” collectors for increased horsepower and torque across the powerband.  The design accommodates both automatic and manual transmission cars with or without power brakes

    They come standard with a polished high luster heat and corrosion resistant metallic ceramic coating for a rich appearance and long life.  These headers come complete with reducers, 1100º F rated gaskets and premium installation hardware.  Headers can also be ordered uncoated.