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  1. Big power upgrade: Big single turbo or twin direct feed?

    Tuning: General
    Can anyone advise as to which is the best way to go for big power in a GTR, I want to know if the traditional big single turbo like a T88, or the other option which I think is called twin "direct feed" turbos? which work best, and the relative cost to get a high power engine, say 800bhp+ any...
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