Originally Posted by sprayed99
Not sure where you found this information, but it has been proven false by many. Hell I have only owned one LS based engine that made under 500 and never once have I had a block failure.
read my post again, ITS THE FACTORY GM RATING. 500HP rated by GM. Just because you CAN do something, doenst mean that the manufacturer will rate the product at that level. The surce of that info is GM literature.