Along with the face-lifted 2016 3 series, BMW has also released one image of the new-designed B58 6 cylinder turbocharged engine, which is used on the upcoming 340i (replacing the 335i).
From the below image depicting the left-hand-side of the engine, we get the below two conclusions about the B58 engine:
1. It is using a single turbocharger, a similar design as the current N55 engine; the turbocharger will be a twin-scroll type;
2. The exhaust manifold is not integrated into the cylinder head; instead it is bolted onto the engine.
Please do not be disappointed about BMW’s decision of keeping the single turbocharger design in the new B58 engine, for such output level (around 320hp), it is better to use one single twin-scroll turbocharger, than a twin-turbocharger design.
For more details about the upcoming refreshed 2016 3 series, please read our previous article here.
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