Callies Magnum Series Forged 4340 Crankshaft for Small Block Chevy CASAJ21A-MG Automatic Transmission Keep your engine well-oiled for

Keep your engine well-oiled for optimal performance with our oil pan pickups

7/16" Thread x 30

The studs come with flat washers and nuts

grade 5 steel and includes a durable black coated finish to enhance the look of your new transmission pan

Callies Magnum Series Forged 4340 Crankshaft for Small Block Chevy CASAJ21A-MG Automatic Transmission Keep your engine well-oiled forCallies Magnum Series Forged 4340 Crankshaft for Small Block Chevy3. 750" Stroke, 2. 100" Pin, 400 Mains CASAJ21A MG SAJ21A MG 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 SAE 4340 steel. Callies then subjects this material to multiple heat treatments, resulting in a crankshaft with unsurpassed wear