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  1. Xp29h

    Question on exhaust manifolds

    recently replaced a 383 hp engine with another. When I took the old 383 out, obviously pulled the exhaust manifolds off. Didn't give them much thought as the plan was headers for the new engine. Reason for the change was the 383 was not running well at all and couldn't get out of its own...
  3. Xp29h

    Headers and horsepower ratings

    Little direction needed if possible. I did a search for headers and hp rating and didn't get much.. Stroking a 400 to 512 from 440 Source. Using their 512 kit and CNC stealth heads (look great too) 571 hydraulic cam. 69 Charger. B body. According to spec, could possibly be close to 600 hp when...
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