To support its massive output Buchko said “the block and internals are unique to this engine.” Like most modern powerplants the S55 features a weight-saving aluminum block and head.

When the BMW M4 and S55 engine debuted in 2014, enthusiasts went wild - with displeasure. Although the straight-six was back, ...

Watch the pieces come off a BMW S55 twin-turbo inline-six from a 2016 M3, and see if you can spot all of the failure points. Engine teardown videos are like a mystery story because you slowly ...