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      10-15-2019, 04:42 PM   #4
TemjinX2
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Drives: 2017 BMW M2
Join Date: Dec 2009
Location: Las Vegas,NV

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probably improvements in head design and vanos in the b58 compared to the s55. keep in mind the s55 is based on the n55 which came out in 2009 versus the b58 that came out in 2015.


you'll probably see a bigger difference when you compare the s55 to the s58

BMW is always improving their engine design.