Kleeman has tuned some sick C55's. The currant C55 is already a NA V8 so the C63 will be a big power upgrade.

But anyway Kleeman has tuned a few that will run to 60 in the 3 second range and the 1/4 mile and top speed numbers are amazing.

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200