MAHLE 4165MS-112 File Fit Piston Ring Set - 4.160in 005in 1.0/1.0/2.0mm

The MAHLE 4165MS-112 is a file fit piston ring set designed for high-performance and racing engine builds requiring precise ring-to-bore fitment. With a nominal bore size of 4.160 inches at +0.005 inch oversize, these rings are intended for use in bores that have been honed to exacting tolerances, allowing the builder to custom-fit the end gap to their specific application.

Key Features:

• Bore Diameter: 4.160 in. (+0.005 in. oversize)
• Ring Pack Configuration: 1.0mm top compression ring / 1.0mm second compression ring / 2.0mm oil control ring
• File Fit Design: Rings are supplied with minimal end gap, allowing the engine builder to file to the precise clearance required
• Narrow Ring Profile: Low-tension, thin-ring design (1.0/1.0/2.0mm) reduces friction and improves engine efficiency
• MAHLE OEM-Grade Materials: Manufactured to stringent quality standards using premium ring materials for durability and consistent sealing
• Performance Application: Ideal for race, high-performance street, and custom engine builds

MAHLE is a globally recognized OEM and aftermarket supplier trusted by professional engine builders. The MS-Series file fit rings are engineered for builders who demand full control over ring end gap, making them a go-to choice for forced induction, nitrous, and naturally aspirated performance builds. Sold as a set for one piston.