NPR SWF20068-2 Piston Ring Set Subaru Oversize - EJ25 100mm

The NPR SWF20068-2 is a complete piston ring set manufactured in Japan by Nippon Piston Ring (NPR), a leading OEM supplier of engine components since 1934. This set includes rings for four pistons and is designed specifically for Subaru EJ25 series engines including the EJ253, EJ255, and EJ257.

Specifications:

• Bore Size: 100mm (+0.50mm oversize)
• Ring Thickness: 1.2mm x 1.2mm x 2.0mm (top compression/second compression/oil ring)
• Quantity: Complete set for 4 cylinders
• Material: Premium steel construction with advanced surface treatments
• Manufacturing: Made in Japan to OEM quality standards

Engine Applications:

• EJ253 (SOHC): 2006-2011 Impreza, 2006-2010 Forester, 2006-2009 Legacy/Outback
• EJ255 (DOHC Turbo): 2004-2012 models including WRX, Forester XT, Legacy GT
• EJ257 (DOHC Turbo): 2004-2010 WRX STI and select Legacy/Outback models

NPR piston rings are engineered to minimize friction and reduce wear while maintaining optimal compression and oil control. These rings feature advanced surface treatments including chrome plating and ferrox coating for enhanced durability and performance under demanding conditions. As an OEM supplier to major manufacturers including Subaru, Toyota, and Nissan, NPR maintains strict quality control standards ensuring proper fit and reliable long-term performance.