I swapped out my good L99 pump for a Melling when I installed a cam. The L99 is ok but a bunch of folks had issues with the LS3 pumps even stock. I personally think it's an installation issue even when installed in the factory. This is the main reason they fail.
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432 RWHP 391 RWTQ 12.37 1/4 mile on stock tires
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