Garrett drove down from Michigan for a dyno tune on his beautiful 2017 velocity red ATS-V coupe. He had an aftermarket intake and catted downpipes installed. His previous tune (red lines) made good peak power, but would close the electronic throttle and go rich around 5,600 rpm. With our tuning (blue lines) we were able to add 20 to 40 whp throughout most of the powerband!
Garrett
from Michigan
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