I think on average, i'm getting about 18mpg on my GTM Stg2 SC Z putting down 507whp with meth and crappy California 91 octane.
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GTM Stg II SC w/ Aquamist methanol injection, GTM oil cooler, Berk HFC, Stillen CBE, BC ER coilovers, Hotchkis sways, TWM short shifter, Clutch spring mod, CarboTech XP8s
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