Re: Header size 350ci 280hp
1 3/4" is a good place to start. It's a good base line. Many racers have had problems and have lost et trying step headers. I would suggest Stahl if they are still making them.They may not be the fastest but would be close. Also, Hooker Super Comps with merge collectors are a good base line.
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Richard Grant 4988 STK
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