MAHLE Bore File Fit Piston Ring Set

The MAHLE Bore File Fit Piston Ring Set is a performance engine piston ring set for builders who want to set their own ring end gap. File fit rings let you control the ring end gap. They are made slightly oversized so each ring can be custom fit to its cylinder. This line suits performance, racing and high-output engine builds.

Key Features:

• File fit design: lets you set the end gap to match your bore, piston and power-adder requirements.
• Low-friction engineering: MAHLE used piston ring simulation and computer development tools to design rings that minimize friction and free up horsepower.
• Ultra-flat ring flanks: these maximize ring-to-piston sealing.
• Coordinated ring packages: the line offers a large selection of coordinated sets in several ring thickness configurations, including ultra-low-friction options.
• Tension options: the line includes standard and low tension oil ring options, depending on part number.
• Top ring technology: depending on part number, the top ring is plasma-moly faced or uses an advanced thermal spray or gas-nitrided treatment for durability and scuff resistance.

Each part number in this line is matched to a specific bore size. Select the variant that matches your cylinder bore and ring thickness requirements. MAHLE's motorsports experience and its focus on sealing, durability and reduced friction make this line a solid choice for engine builds that demand consistent performance.