Trick Flows Make 600hp

RustyRatRod said

Gotchya. Maybe they are Dougs Dyno headers? I would think "Dougs" would mean whatever the car's runnin.

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I think the car will be run with Doug’s but other headers were used to make the numbers on the dyno. My brother has a 66 Dart, only TTI and Doug’s make headers to fit, neither are fun, both are 1 5/8. Unless you fab something else.
Wonder what bore it is, lot of inches with that crank