The tunes really do help bring things in order. MY AFR at idle is 14.6 and when at WOT it drops into the 12s. My MAF readings I took said my stock box with drop ins gobbled up 240 G/S when stepping on it and Im only 8-10 degrees above ambient temps. The tune gav e the car some decent gains and has my AFRs where they should be. Worth the money since you get a diagnostic device too.
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2010 LS3 C6 Silver coupe corvette
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