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There was a big thread about this somewhere on the forum. I also have a 1SS and will be installing the GM lowering kit, 1LE sway bars, handling links and 1LE spec width tires. From what GM testing showed, that would get an SS to about 77% of the 1LE performance.
With that said and my current skill level, I’m not sure I would run any faster in a 1LE or a base SS. Practice/experience is king.
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