Callies Magnum Crankshaft, Chevrolet Small Block, 400 Main, 2pc Rear Main Seal
The next standard in high performance crankshafts. They feature shaped and profiled counterweights for enhanced windage reduction. Of course as all Callies cranks, they use high purity 4340 alloy forging, close tolerance machining, and heat-treat. All throws have Angalite lightening holes and pin arms profiled. Small block cranks also feature gun drilled mains for additional weight savings. Typical small block weighs 47-51 pounds. Requires chamfered bearings.
Part Type: Crankshaft
Application: Chevrolet Small Block
Crankshaft Material: 4340 Forged Steel
Nitrided: Yes
Rear Main Seal Style: 2 piece
Engine Main Bearing Type: 400 Main
Stroke: 4.250"
Rod Length: 6.000" and up
Rod Journal Diameter: 2.100"
Crankshaft Snout Size: Standard
Engine Balance: Internal
Lightening Holes In Rod Throws: Yes
Gun Drilled Mains: Yes
Rod Bearings Included: No
Requires Narrow Bearings: Yes
Main Bearings Included: No
Manufacturer: Callies
Manufacturer's Part Number: SAP21A-MG
Weight: 48 lbs
Warranty: Sold without warranty, expressed or implied
Quantity: Sold as Each