MAHLE 4045ML-043 Piston Ring Set Bore File Fit Low Tension - 4.040

The MAHLE 4045ML-043 is a high-performance piston ring set designed for 4.040" bore engines with a +0.005" oversize. This file-fit ring set features an ultra-low friction configuration with 0.043" top ring, 0.043" second ring, and 3.0mm oil ring for maximum performance and reduced friction.

Ring Specifications:

• Bore size: 4.040" (+0.005" oversize)
• Top ring: 0.043" ductile iron with plasma moly barrel face
• Second ring: 0.043" cast iron reverse twist
• Oil ring: 3.0mm three-piece low tension design
• File-fit design for precise end gap adjustment

Performance Features:

• Low tension design reduces friction for increased horsepower
• Ultra-flat ring flanks maximize ring-to-piston sealing
• Plasma moly coating on top ring for superior wear resistance
• Reverse twist second ring enhances oil control
• Engineered using advanced piston ring simulation and computer development tools

MAHLE's precision-engineered piston rings deliver proven performance gains on both the dyno and the track. The file-fit design allows engine builders to custom-fit each ring for optimal end gap clearance, ensuring perfect sealing and maximum performance in high-performance and racing applications.