What's tune legal in California ???
Only tune that is technically CARB legal is the GM Turbo Ugrade Kit (also commonly called GMS1 or GM Stage 1).
With that said, as long as your tune doesn't disable emissions related testing and codes you can go with whatever reputable tuner you want. The GM Stage 1 is mostly garbage anyhow.
With that said, as long as your tune doesn't disable emissions related testing and codes you can go with whatever reputable tuner you want. The GM Stage 1 is mostly garbage anyhow.
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Dougsterbob
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May 20, 2016 12:14 AM



