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Eagle forged 4340 steel crankshaft for Chrysler RB applications, 4.150" stroke with an 8‑bolt rear flange. The crank uses a non-twist forging and .125" fillet radiuses for added strength, so chamfered or narrowed bearings are required. Nitrided surface treatment and micropolished journals improve wear resistance. Built for demanding, high-power engine use where durability matters.
Eagle Chrysler BB 8 Bolt Rear Flange 4.150in Stroke Forged 4340 Steel Crankshaft
