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SupraTTs
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mk4 supra tt (auto) i really wana know now when i have downpipe, exhaust, airfilter, manual greddy boost controller, intercooler and cam gear too .... how much boost power i can raise to and how much hp i gain when the boost is up level max without harming the engine sorry about this beacause we dont have dyno in our country so can i know the details plz