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I've got HP Tuners and I did a lot of reading, I am no where near to being a tuner, but I would use HP Tuner or EFI live before a handheld tuner, and if I would do it again I would get the Pro upgrade on the HP Tuner.
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'10 Camaro 2SS/RS Red Jewel VVTLS3/A6
'15Camaro Z/28 Ashen Gray
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