NPR SWC10024-3 Piston Ring Set 5.7L HEMI V8 +0.030 Oversize

The NPR SWC10024-3 is a complete piston ring set engineered by NPR (Nippon Piston Ring) for the Chrysler 5.7L HEMI V8 engine. The -3 suffix designates a +0.030" (0.75mm) oversize ring set, intended for use on engines that have been bored to the third oversize specification during a rebuild.

Key Features:

• Manufacturer: NPR of America (Nippon Piston Ring) — made in Japan
• Ring Set Type: Complete engine piston ring set (compression rings + oil control ring) for all cylinders
• Oversize: +0.030" / +0.75mm (third oversize — suited for re-bored cylinders)
• Material: Premium steel construction for reduced wear, superior heat resistance, and improved sealing over cast iron alternatives
• Surface Treatment: Advanced surface treatments including nitriding and/or PVD coating for enhanced wear resistance and durability
• Standards: Manufactured to JIS (Japanese Industrial Standard) B8032-6 specifications
• Engine Application: 5.7L 345CID V8 HEMI OHV (Chrysler, Dodge, Jeep, Ram platforms)

NPR piston rings are designed to seal combustion gases, regulate oil consumption, dissipate heat from the piston crown, and prevent cylinder wall wear and seizure. NPR's steel ring technology delivers superior strength-to-mass ratios compared to traditional cast iron, offering improved conformability to cylinder bore irregularities and extended service life. NPR products are benchmarked against OEM engine builder specifications and are trusted globally as both OEM supply and premium aftermarket replacements.