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he gained about 12 bhp from mine. and a 11 ft lb torque. what ever he has done has definatally made a difference. its definatally better in 2nd and 3rd gear.
looking at my before and after graph, and looking at micks whilst i was down there, there is an improvement all the way through the rev range
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Astra GSi turbo
Regal Autosport Astra GSI Turbo 304 bhp 356 lb/ft
Thorney motorsport Vectra vxr 305bhp 398lbft
Now its time to build a big turbo MG ZS
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