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Ditto here.
Been running a Quaife ATB diff from Birds on my M135i. Makes an appreciable difference to how the car drives and accelerates, even on the road...
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2013 M135i N55 F21 | Scorpion TBE and Decat |AirREX & Accuair air-ride | JB4 Stage 2 | BMW MP Blackline lights | BMW MP grills | SSDD Carbon Splitter | Birds/Quaife ATB diff | Forge intercooler and atmo BOV
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