MAHLE 9300MS-12 Performance Piston Ring Set Bore - 93mm 1.2mm 1.2mm 2.8mm

The MAHLE 9300MS-12 is a high-performance piston ring set engineered for sport compact engines with a 93mm bore diameter. This drop-in ring set features MAHLE's advanced ring technology designed to minimize friction and maximize horsepower output.

Ring Configuration:

• Top Ring: 1.2mm steel nitrided construction for superior strength and wear resistance
• Second Ring: 1.2mm reverse twist cast iron design for optimal oil control and sealing
• Oil Control Ring: 2.8mm standard tension three-piece assembly

Key Features:

• 93.00mm bore diameter with drop-in fit for easy installation
• Steel nitrided top ring provides excellent durability and scuff resistance
• Ultra-flat ring flanks maximize ring-to-piston sealing efficiency
• Reverse twist cast iron second ring delivers superior combustion gas management
• Standard tension oil control rings provide reliable lubrication control
• Engineered using advanced piston ring simulation and computer development

MAHLE's sport compact ring sets are specifically designed for performance applications ranging from 81-100mm bore sizes. The precision-engineered ring geometry reduces friction losses while maintaining optimal cylinder sealing, resulting in measurable power gains. This ring set is commonly used in Subaru EJ20/EJ207 engines and other sport compact applications requiring 93mm bore piston rings.