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  1. G

    Dougs D452 vs D451

    Hi all Can I bolt my D452 headers to a 400 B motor. They are coming off a 440 RB. The site calls for a D451 for a 400. Thanks. Erik.
  3. G

    Opinion needed

    hi I'm ready for exhaust. I have 69 coronet with a approx 500 hp 600 ft lb. 440. Doug's headers. I saw frieburgers hot rod garage about 3" vs 2.5". My exhaust guy doesn't wanna do up and over the rear axle with 3". I was thinking 2.5" from headers back with y's and block off plates. That way...
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