NPR SWF20045-0 Piston Ring Set for Subaru Engine - EJ22

The NPR SWF20045-0 is a high-quality piston ring set engineered specifically for Subaru EJ22 2.2-liter horizontally opposed 4-cylinder engines found in Legacy models. Manufactured by Nippon Piston Ring (NPR), a leading Japanese producer of OEM and aftermarket engine components, this ring set delivers reliable sealing and long-lasting performance.

Key Features:

• Designed for 96.9mm bore diameter (standard size)
• Complete 3-piece ring set per cylinder: compression rings and oil control ring
• First compression ring: 1.2mm thickness with barrel face and chrome surface treatment
• Second compression ring: 1.5mm thickness with taper face and ferrox coating
• Oil control ring: 3.0mm thickness with chrome plating for wear resistance
• Precision-engineered to OEM specifications for proper compression and oil control
• Advanced surface treatments reduce friction and extend service life

NPR piston rings are known for their precise manufacturing tolerances and durable coatings that provide excellent sealing characteristics, reduced blow-by, and optimal oil consumption. The standard size designation (-0) indicates this set is for engines within factory bore specifications.