I went with Diablo I3 on my 2013 LS3, am very happy with results. Always great performance and customer support from Diablo. Will likely add a custom tune after headers are in.
Had an i1000 on my 2010 Corvette and I2 on my 1999 Corvette, both 6 speed. Sold them with the cars but should have kept the I2. I3 is much faster though.
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