Mahle piston ring set 4.030 in bore 1.5 x 1.5 x 3.0 mm standard tension MAH4035MS-15

Precise ring sealing is fundamental to engine performance, and a quality piston ring set directly impacts compression, blow-by control, and overall reliability. The MAHLE Performance Series delivers file-fit precision and proven durability through ductile iron construction and plasma moly coating—essential for serious racers and high-revving builds that demand consistent ring stability under extreme conditions. Whether you're rebuilding a competition engine or restoring a classic V8, this set gives you the engineering and fitment control to maximize efficiency and longevity.

The file-fit design allows for customized gap sizing to match your specific engine build and ring groove tolerances, eliminating guesswork and ensuring optimal sealing across the entire power band. Plasma moly coating accelerates break-in while reducing friction and wear on cylinder walls, a critical advantage in forced-induction and naturally aspirated high-performance applications.

• Ductile iron construction
• Plasma moly coating
• File-fit design
• 1.5 x 1.5 x 3.0 mm
• 4.035-inch bore
• Standard tension
• 8-cylinder compatible
• MPN: 4035MS-15