MAHLE 3021261B Performance Piston Ring Set Napier Bore - THM-13 4.105

The MAHLE 3021261B is a high-performance piston ring set designed for precision engine builds. This Napier-style ring set features THM-13 coating technology for enhanced durability and reduced friction in demanding applications.

Key Specifications:

• Bore size: 4.105 inches (104.267mm)
• Top ring thickness: 1.0mm
• Ring configuration: 136-inch radial wall (RW) design
• Plain ring construction without coating on wear surface
• Napier-style second ring for improved oil control

MAHLE piston rings are engineered to OEM specifications and beyond, utilizing advanced materials and coatings to provide optimal sealing, reduced blow-by, and extended engine life. The THM-13 treatment provides excellent wear resistance while the plain ring face offers traditional sealing characteristics for performance applications.

This ring set is ideal for engine rebuilds and performance upgrades where precise bore sizing and quality ring materials are critical for achieving maximum power and reliability.