Callies SMO21A-MG Small Block Chevy, Magnum, Forged Crankshaft, 3.75 in. Stroke, Internal, 2-Piece

$2,936.00
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SKU:
CALSMO21A-MG
MPN:
SMO-21A-MG
Condition:
New
Weight:
56.30 LBS
Shipping:
Calculated at Checkout

Applies To Continental U.S. orders only

Out of stock

After years of service, Magnum crankshafts by Callies have established themselves as one of the most durable competition crankshafts ever produced. Magnum crankshafts are manufactured from ultra pure AISI 4340 steel. Callies then subjects this material to multiple heat treatments, resulting in a crankshaft with unsurpassed wear and strength characteristics. All Magnum cranks feature Callies Ultra-Case heat treatment. Each Magnum crank will have gun drilled mains and fully profiled counterweights, regardless of engine type. A typical 4.000 in. stroke Small Block Chevy will weigh less than 48 pounds. Magnum crankshafts are available for a variety of engine types.

Rear Main Seal Style:
2-piece
Engine Stroke (in.):
4.000 in.
Crankshaft Material:
Forged 4340 steel
Engine Balance:
Internal
Lightened:
Yes
Requires Narrow Bearings:
Yes
Rod Bearings Included:
No
Main Bearings Included:
No
Rod Journal Diameter (in.):
2.100 in.
Main Journal Diameter (in.):
2.648 in.
Rod Length:
6.000 in.
Crankshaft Snout Style:
Custom
Balancer Bolt Thread Size:
Custom
Weight:
50 lbs.
Quantity:
Sold individually.
Notes:
400 Mains
Make:
Chevrolet
Engine Family:
Chevy small block Gen I
Engine Sizes:
6.6L/400
Years:
1970-1980
Crankshaft to Flywheel Attachment:
6-bolt