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9 lbs boost is too much and fuel pump pressure could be a problem - it is bound to be not very reliable and prone to "never " working the way it should - 500HP - buy a new M-5 or6
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2006 M COUPE - 380 total production, 1 of 40 Imola Red produced for NA , ESS 455 Supercharger, Speedhut Gauges, VPM CLS wheels, 19" Hancooks, Stromung Exhaust, Carbon fibre accessories and black and white badging,  |