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Discussion Starter · #1 ·
Since I bought my E5 last March I've been assuming that the previous owner got 1.3 bar peak by chucking out the grommet. So today, when I was rummaging through a box of bits he gave me, I was surprised to find an invoice for GP fast-road boost change with the parts supplied being a GP Valve and Bleed Set . Presumably the GP stands for Global Performance , where the work was done. But heres the point - labour charge £190 and parts £45 - before VAT. Whats been done to the car that took 6??? hours!! Anyone know what this very special mod is? Cant just be a restrictor - surely ;)

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