Piston Ring Set 4.040 1.0mm 1.0mm 2.0mm 4045MS-112

Piston ring selection directly impacts combustion efficiency, blow-by control, and engine longevity—especially in high-performance or rebuilt applications where precision matters. The 4045MS-112 delivers plasma-moly durability and file-fit accuracy for engines demanding reliable ring sealing without compromises. Whether you're freshening a naturally aspirated engine or building a competition platform, this ring set ensures consistent compression and reduced oil consumption across the RPM range.

• 4.040 inch bore
• File fit required
• 1.0mm top ring
• 1.0mm second ring
• 2.0mm oil ring
• Plasma-moly coating
• Standard tension
• 8-cylinder kit