Not req. But it will bring out the best in the car, even reg driving, low end torque and those parts hp/tq. So u pick, i do recommend to anyone even stock cars, the tune unlocks the real Z.
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Kids don't do Drugs, Drugs are bad, so let the professional druggies do Drugs for you.  537whp/496lb/tq@8-9PSI 93 octane
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