MAHLE 42209.020 Engine Piston Ring Set Oversize - 0.020

The MAHLE 42209.020 is a complete engine piston ring set engineered to OEM-equivalent tolerances, designed for engine rebuilds and overhaul applications. The .020 oversize designation indicates rings sized at +0.020" (0.508mm) over standard bore diameter, making this set ideal for use with bored or honed cylinders during engine reconditioning.

MAHLE is a globally recognized OEM and aftermarket supplier of engine components, manufacturing piston rings to the same specifications and materials used in original factory assemblies. These rings deliver reliable sealing, oil control, and compression performance consistent with new-engine standards.

Key Features:

• +0.020" Oversize — engineered for cylinders bored or honed to +0.020" over standard diameter
• OEM-grade materials — manufactured using the same alloys, coatings, and tolerances as original equipment rings
• Complete ring set — includes compression rings and oil control rings for a full cylinder complement
• Precision ground — tight dimensional tolerances ensure proper end gap, radial depth, and ring width for optimal sealing
• Corrosion-resistant coatings — surface treatments help reduce wear and extend service life
• Designed for use during engine rebuilds, overhauls, and cylinder reconditioning

MAHLE piston ring sets are a trusted choice for professional engine builders and rebuilders seeking factory-quality components. The 42209.020 set supports a reliable, long-lasting engine rebuild when installed to manufacturer specifications.