Thread: 2.5 or 3 inch exhaust, 351C
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Old 12-20-2006, 06:59 AM
6D9 6D9 is offline
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A mandrel 2.5" with and X pipe is more than enough for your set up. Most feel that after 500hp or so 3" is needed. I went from 3" back down to 2.5" and lost nothing. This is with a 408sbc.
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