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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". Counterweight O.D. is designed for 6.100" to 6.125" length rod, approx. 1875g bobweight. Fully CNC'd on 5-axis machining centers, including 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.

Part # Description # Stroke Crank Pin Main Buy Now Status
BC5456U CRANKSHAFT - Chevrolet LS Series, 4.000" Stroke w/58 Tooth Reluctor Wheel, 4340 Forged, Unbalanced 4.000" 2.0987" 2.558" In-Stock
BC5457 CRANKSHAFT - Chevrolet LS Series, 4.100" Stroke w/58 Tooth Reluctor Wheel, 4340 Forged, Fully Balanced 4.100" 2.0987" 2.558" In-Stock
BC5457U CRANKSHAFT - Chevrolet LS Series, 4.100" Stroke w/58 Tooth Reluctor Wheel, 4340 Forged, Unbalanced 4.100" 2.0987" 2.558" In-Stock
BC5458 CRANKSHAFT - Chevrolet LS Series, 4.125" Stroke w/58 Tooth Reluctor Wheel, 4340 Forged, Fully Balanced 4.125" 2.0987" 2.558" In-Stock
BC5458U CRANKSHAFT - Chevrolet LS Series, 4.125" Stroke w/58 Tooth Reluctor Wheel, 4340 Forged, Unbalanced 4.125" 2.0987" 2.558" In-Stock
BC5459 CRANKSHAFT - Chevrolet LS Series, 4.250" Stroke w/58 Tooth Reluctor Wheel, 4340 Forged, Fully Balanced 4.250" 2.0987" 2.558" In-Stock
BC5459U CRANKSHAFT - Chevrolet LS Series, 4.250" Stroke w/58 Tooth Reluctor Wheel, 4340 Forged, 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.   Follow runBC on Twitter     
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