BigBoost pulls B58 pistons and rods preparing their forged upgrades

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Dec 1, 2016
New York
Looks similar to every piston and rod bmw has put in their inline 6 for the past 20 years lol. They are already forged by the way. With pistons and rods upgraded though I'd expect to see these B58 blocks handle 1000whp+ builds. Closed deck and the forged crank is a solid piece again instead of that friction disk nonsense. The two major things that needed addressing on the the N5x/S55 to make big power...
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Reactions: tisdrew


Dec 11, 2018
How much power can a B58 make on stock internals?

Even with upgraded turbos and everything else but keeping the stock longblock.

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