Do not bother with GTM. They don't answer because they don't care about customer service. Use your money on people who love what they do for living.
Why do you want Supercharger over turbo kit may I ask? if its about price you can go for Boosted Performance turbo kit.. Its the best for the buck. I would've also recommended VSR turbo kit but you need to send the car to them to do the install.
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