Quote:
Originally Posted by Gearhead
Any one know what our car's (420 s) max horsepower (safe) are able to put at wheel's, some tuner's are telling me 480-490 another is saying 530-550 on stock long block
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Stock 4.6 block???? 500 or under is safe...but even 430 rwhp can break. Safe tune and not over reving is key to keeping it together at any HP level.