Subaru 2.5L EJ25 / EJ257 Billet Crankshaft (Ultralight)
Gun drilled crank pin and counterweights to reduce weight and rotating mass
Journal radium disperse load stress.
Dual passage – straight through oil feeding. Each journal having two main sources of oil feed, providing enhanced lubrication at higher RPM
Crankshaft is fully balanced on Sunnen machines 1gr +/- 0.1 and ready to install.
ZRP laser mark logo.
Manufactured from 4340 Precision Billet Steel
Full CNC machining
Nitride process for hardening
Multi-stage Heat Treatment
Shot peening for improved fatigue resistance
Magna-fluxing for flawless surface finish
Heat treatment for superior wear resistance
Micro-polishing for longer bearing life
Combination tested to over 1000HP