If you've been following our 2020 GT500, you'll know that we have been doing the modifications step by step to help learn more about the vehicle and to show you what it can make at each step. Next up is testing at higher boost thanks to a variety of SPE supercharger pulleys. I'll go over the baseline on 93 octane and E85 and then I'll show the gains with a 2.9" pulley and step my way down to a 2.27"!!

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