Quote:
Originally Posted by stieger
LS3 and LS9 are two different engines. The LS3 is a 376 cubic inch with 426 horse power engine. The LS9 is a 350 cubic inch with 350 horse power and 425 lbs/ft torque.
You can't make an LS3 into an LS9. You'd just have to do an engine swap
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Am I missing something here? The LS9 is a reworked LS3 with a supercharger. Its 376ci (6.2L) that puts out 638hp. I think youre thinking of the LS9 from the '70s!!