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Magnum Series III Big Block Chevy Forged 4340 Crankshaft CABBP42B-MG
Description
Magnum Series III Big Block Chevy Forged 4340 Crankshaft4.250" stroke, 2.750" mains, 2.200" pins, internal balance, nitrided CABBP42B-MG BBP42B-MG Average Weight for 4.500 in. Stroke Balanced to 2350g Bob. = 69 lbs
Gun Drilled Mains, With 8 Full Counterweights
All Rod Journals Lightened
Dual post Keyways
Heat Treatment = Perma Case Deep Nitride
Requires narrow bearings
Enhanced rod oiling through the use of main bearing oil hole lead-ins.
Two Piece Seal Type
Made in USA
Your 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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