First introduced in 2014 for the F80 M3 and F82 M4 Coupe, the BMW S55 was a 3.0-litre inline six-cylinder petrol engine with direct injection and parallel single-scroll turbochargers. Like the N55 engine on which it was based, the S55 engine had an 84.0 mm bore and 89.6 mm stroke for a capacity of 2979 […]
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