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I swapped out the stock TB for a Vmax CNC ported one a couple weeks ago. I thought it was the best bang for the buck mod so far. Your numbers confirm what I thought.
Surprised the LS3 TB didn't give the highest numbers. I assume the stock tune was the limiting factor?
Anyone looking for a little more oomph at the low end and significantly better throttle response might want to consider doing a ported TB swap. It's a cheap and easy mod that provides a nice little performance boost.
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