Description
Magnum Series III Big Block Chevy Forged 4340 Crankshaft
4.750″ stroke, 2.750″ mains, 2.200″ pins, internal balance, nitrided
CABBS42B-MG
BBS42B-MG
Average Weight for 4.500 in. Stroke Balanced to 2350g Bob. = 69 lbsGun Drilled Mains, With 8 Full CounterweightsAll Rod Journals LightenedDual post KeywaysHeat Treatment = Perma Case Deep NitrideRequires narrow bearingsEnhanced rod oiling through the use of main bearing oil hole lead-ins.Two Piece Seal TypeMade in USAYour request for a lightweight yet durable crankshaft for the powerful big block Chevy engine has been answered. Callies’ design team has optimised material distribution throughout this crankshaft to produce a component that is strong yet easy to balance.Many BBC crankshafts are counterweighted to offset simple balance forces detected at main bearings 1 and 5 by today’s precision balancers. Callies Magnum Mass Correct counterweights have beenstrategically placed to reduce imbalance forces over the entire length of the shaft. The result is a crankshaft that exhibits superior bearing life and minimal wear.
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