MAHLE 41768.040 Perfect Circle Premium Piston Ring Set Oversize - 0.040

The MAHLE Perfect Circle 41768.040 is a premium piston ring set engineered for engine rebuilds requiring a +0.040" (1mm) oversize. MAHLE's Perfect Circle brand is one of the most trusted names in engine sealing components, delivering OEM-quality performance for professional engine builders and serious DIY mechanics alike.

These piston rings are manufactured to precise tolerances to restore proper cylinder sealing, compression, and oil control in worn or freshly bored engines. Each ring in the set is designed to work in harmony to maximize power output, reduce oil consumption, and extend engine life.

Key Features:

• +0.040" Oversize – engineered for cylinders bored 0.040" over standard bore diameter
• Premium Materials – high-quality cast iron and/or steel construction for durability and heat resistance
• Precision-Engineered Gap Tolerances – ensures proper sealing and ring expansion under operating temperatures
• Complete Ring Set – includes compression rings and oil control ring assembly for each cylinder
• OEM-Grade Quality – manufactured by MAHLE, a global OEM supplier to major automotive manufacturers
• Surface Treatments – rings feature specialized coatings for reduced friction and improved wear resistance
• Optimized Tension – balanced ring tension minimizes oil consumption while maintaining effective cylinder sealing

MAHLE Perfect Circle piston rings are a go-to choice for engine rebuilders seeking reliable, long-lasting performance. Whether used in a professional shop rebuild or a performance engine build, the 41768.040 set delivers the sealing integrity needed to bring an engine back to like-new specification.