MAHLE 9400MS-12 Performance Piston Ring Set Bore Drop-In - 94mm 1.2/1.2/2.8mm

The MAHLE 9400MS-12 is a performance drop-in piston ring set designed for a 94.00mm bore with ring widths of 1.2mm top / 1.2mm second / 2.8mm oil control. Engineered for sport compact and performance engine applications, these rings deliver superior sealing, durability, and reduced friction compared to OEM-style alternatives.

Part of MAHLE's widely respected MS-series sport compact ring lineup, the 9400MS-12 features a steel nitrided top ring for exceptional wear resistance and scuff resistance, a reverse cast iron second ring for optimal sealing, and standard tension oil control rings for efficient oil management. The drop-in design simplifies installation, making these rings suitable for both professional builders and experienced DIY engine rebuilds.

Key Features:

• Bore Size: 94.00mm
• Top Ring: 1.2mm — Steel nitrided construction for superior durability and scuff resistance
• Second Ring: 1.2mm — Reverse cast iron for enhanced sealing performance
• Oil Control Ring: 2.8mm — Standard tension design for effective oil management
• Drop-in fitment for straightforward installation
• Available across 81–100mm bore range family
• Designed for sport compact and performance engine rebuilds

MAHLE is a globally recognized OEM and performance engine component manufacturer trusted by engine builders worldwide. The 9400MS-12 ring set is an excellent choice for anyone building or rebuilding a high-performance engine requiring a 94mm bore ring package.