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LS SERIES CRANKSHAFTS
BC performance crankshafts are CNC milled from 4340 non-twist forgings in a stroke range of 4.000", 4.125" and 4.250". Six counterweight O.D. is designed for 6.125" length rod, approx. rough 1875g bobweight. Available in wet sump LS1 style or dry sump LS7 snout designs Fully CNC milled on 5-axis machining centers, including straight-shot oil holes for the best oiling possible. Includes 2 keyways on the snout (OEM is 1 keyway) for added keyway support in heavy duty applications, gun-drilled down the center to lighten it up without compromising strength. Cranks are unbalanced to final bobweight but can be balanced in-house for $250.

Part # Description # Stroke Crank Pin Main Buy Now Status
BC5456 CRANKSHAFT - Chevrolet LS Series, 4.000" Stroke w/58 Tooth Reluctor Wheel, 4340 Non-Twist Forging, Unbalanced 4.000" 2.0987" 2.558" In-Stock
BC5456-LS7 CRANKSHAFT - Chevrolet LS7, 4.000" Stroke w/58 Tooth Reluctor Wheel, 4340 Non-Twist Forging, Unbalanced 4.000" 2.0987" 2.558" In-Stock
BC5458 CRANKSHAFT - Chevrolet LS Series, 4.125" Stroke w/58 Tooth Reluctor Wheel, 4340 Non-Twist Forging, Unbalanced 4.125" 2.0987" 2.558" In-Stock
BC5458-LS7 CRANKSHAFT - Chevrolet LS7, 4.125" Stroke w/58 Tooth Reluctor Wheel, 4340 Non-Twist Forging, Unbalanced 4.125" 2.0987" 2.558" In-Stock
BC5459 CRANKSHAFT - Chevrolet LS Series, 4.250" Stroke w/58 Tooth Reluctor Wheel, 4340 Non-Twist Forging, Unbalanced 4.250" 2.0987" 2.558" In-Stock
BC5459-LS7 CRANKSHAFT - Chevrolet LS7, 4.250" Stroke w/58 Tooth Reluctor Wheel, 4340 Non-Twist Forging, Unbalanced 4.250" 2.0987" 2.558" In-Stock
619.749.9018 ph
619.749.9128 fx
Some products listed are not legal for sale or use on emission controlled motor vehicles, RPM ranges vary on application.Warranty Information Copyright © Brian Crower Inc. All rights reserved..
WARNING: This product can expose you to chemicals, including Chromium (hexavalent compounds), lead and lead compounds, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, visit www.p65warnings.ca.gov