Billet Crankshaft Chrysler GEN III Hemi 3.900 Stroke 345-3900JB8B By Molnar

Crank it till you make it! If you’re stuffing your GEN III HEMI full of boost, fury, and questionable life decisions, you’re gonna need a crankshaft that won’t tap out when the going gets high-RPM.

Enter the Molnar Crankshaft, specifically designed for Chrysler GEN III HEMIs with a 3.900″ stroke and ready to party. This bad boy features 8 counterweights (yes, 8 — because stability is sexy), a 2.559” main, 2.100” rod journal, and works best with a 6.125” or longer rod. And guess what? It’s internally balanced, so you don’t need to deal with any external counterweight nonsense. It’s all chill on the inside—like your favorite car buddy who actually knows what they’re doing.

We’re talking forged steel strength, machined to perfection, and balanced for a bob weight of 1750. Translation: it handles power like a champ and won’t flinch under pressure (unlike your last project car).

Whether you’re going for drag-strip dominance or street-sleeper sneakiness, this crank is built for people who like their engines like their coffee—strong, fast, and a little over the top. It’s not just a crankshaft—it’s the spine of your horsepower monster.

So go ahead, spin it to the moon. Molnar’s got your back (and your bottom end).