Tony G. had a 2013 GT500 in the shop a few days ago. Doing some tuning and adding a VMP 2.4 TVS pulley and Tony G. tune on it. Here are the results of the pulley. Also it was over 100 degrees in the shop and humidity in the 60%+. Nice gains!!!!!!!!!!!
Before (base stock tune)
After pulley and Tony tune
Before (base stock tune)
After pulley and Tony tune
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