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Brian Crower BMW S58 Billet Crankshaft (BC5329LW)
If you're building an S58 and you're already planning to push some real power, the stock crank is eventually gonna give up. That's just the reality of it. The Brian Crower BC5329LW is a 4340 billet steel unit that's made to handle the heavy load. This thing is 100.6mm stroke, and because it's billet, it's way stronger than the factory piece.We like these because they aren't just strong, they're lightweight. Shaving rotating mass helps the S58 rev way faster and keeps the stress off the bearings when you're deep into the RPM range. If you're building a motor that's gonna see a lot of boost or time at the track, you don't wanna cut corners here.why you'd pick this over stock:
- 4340 billet steel: it's not cast, it's not just "forged"—it's billet. it's what you want when you don't want the crank to flex at 800+ hp.
- 100.6mm stroke: it's perfectly spec'd for the S58B30T0 platform.
- weight savings: less mass means the engine snaps through the revs faster. feels way punchier on the road.
- perfect tolerances: BC takes their machining seriously, so you aren't fighting to get your clearances right.
what it fits
- engine: bmw s58 b30t0 (the one in the g80/g82 m cars).
- best for: serious drag setups, track cars, or any high-boost build.
- headsup: if you're buying this, you're obviously doing a full engine build. take it to a pro shop so they can set your clearances right.
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