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Callies-Magnum XL-Big Block Chevy Crankshafts

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Availability: In stock

$2,657.00

Quick Overview

Callies



  • Uniquely Milled Counterweight Profiles for Reduced Weight and Windage

  • 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

  • Stroke Availability from 3.500 in. to 4.875 in.

  • Heat Treatment = Perma Case Deep Nitride


Magnum XL

Callies-Magnum XL-Big Block Chevy Crankshafts

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$2,657.00

Details

Callies has once again established a new standard for lightweight crankshafts. Magnum XL lightening profiles result in crankshafts having extremely high strength to weight ratios. Material is carefully removed from non-stressed areas of each shaft to eliminate parasitic weight. The Callies Magnum XL profile is effective at minimizing windage within the crankcase atmosphere. Oil control is improved by not relying on counterweight undercutting to eliminate weight.

All Magnum XL crankshafts feature the Callies Ultra-Case nitride treatment. This heat treatment method produces a deep case that enhances strength while creating an extremely hard load bearing wear surface. The Ultra-Case process generates a layer of hardened steel deep enough to maintain its integrity even after a -.010 regrind.

Each main and rod journal is drilled for weight reduction and throttle response improvement.

Part #

Stroke

Pin Main
BLZ82B-XL 3.6500 2.2000 (409) GM Big Block Main – 2.497
BLJ43B-XL 3.7500 2.1000 GM Big Block – 2.750
BLM43B-XL 3.8750 2.1000 GM Big Block – 2.750
BLO42B-XL 4.0000 2.2000 GM Big Block – 2.750
BLO43B-XL 4.0000 2.1000 GM Big Block – 2.750
BLU42B-XL 4.1250 2.2000 GM Big Block – 2.750
BLU43B-XL 4.1250 2.1000 GM Big Block – 2.750
BLP42B-XL 4.2500 2.2000 GM Big Block – 2.750
BLP43B-XL 4.2500 2.1000 GM Big Block – 2.750
BLB42B-XL 4.3750 2.2000 GM Big Block – 2.750
BLB43B-XL 4.3750 2.1000 GM Big Block – 2.750
BLQ42B-XL 4.5000 2.2000 GM Big Block – 2.750
BLQ43B-XL 4.5000 2.1000 GM Big Block – 2.750
BLR42B-XL 4.6250 2.2000 GM Big Block – 2.750
BLR43B-XL 4.6250 2.1000 GM Big Block – 2.750