CJM x Callies Compstar Crankshaft

Engineered for Maximum Effort builds, every SS (Sport Series) crankshaft is finished with the same precision and attention to detail as the complete Compstar lineup. Each SS crank comes fully balanced and ready for assembly. Compstars SS series delivers industry-leading metallurgy and heat-treatment quality for exceptional strength and reliability.

Subaru EJ20 / EJ25

Standard Features:

• Average weight: 18 lbs
• Lightened design with drilled rod journals
• Material verified in Callies in-house metallurgical lab
• Ultra-Case nitriding performed and certified in house
• Journal diameters held to a strict 0.0005″ tolerance