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      10-09-2019, 06:11 PM   #31

Drives: 2014 335i
Join Date: Jul 2017
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2014 BMW 335i  [0.00]
Originally Posted by Remonster View Post
The turbos are definitely different part numbers, both versions of B58 turbos have the exhaust manifold integrated into the turbine housing.

All variants of BMW's B58 from the original 2016 340i to the newest G29 Z4 M40i (both US and EU spec) use a typical 6 to 2 manifold design that you would see on a twin scroll turbocharger.

The Toyota Supra's B58 has the 3 to 1 sections of its exhaust manifold built into the engine cylinder head where the manifold is actually cooled by the engine coolant. This engine only has 2 external exhaust ports that go directly into the twin scroll turbo housing.
There are some Euro Z4 M40i models with the B58C that have that feature.

In America, all the newer non M Performance cars will now use the version of the motor with the integrated exhaust manifold like the 540i, 740i, (maybe the 840i?), and the X5 x40i.