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I ran ls7 prc 285 heads on my sleeved 454. They flow 415 cfm on 4.125 bore where the factory ls7s flow 370. My 454 made over 700 motor hp and over 600 rwhp.
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06 gto Maggie 489 rwhp sold
05 gto ERL/HKE 454 609rwhp na sold
06 Z06 500 rwhp sold
10 2ss ERL 427 530 rwhp sold
14 1ss 1le
Last edited by delphigto; 12-03-2015 at 09:24 AM.
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