NPR SWF20054-0 Piston Ring Set for Subaru Justy Domingo 78mm

The NPR SWF20054-0 is a premium piston ring set engineered for specific Subaru and Isuzu three-cylinder engines with 78.0mm bore diameter. This complete ring set is manufactured by Nippon Piston Ring Co., Ltd., a leading Japanese supplier of OEM and aftermarket engine components since 1973.

Technical Specifications:

• Bore Diameter: 78.0mm (3.071 inches)
• Application: Isuzu EF10 (997cc) and EF12 (1,189cc) 3-cylinder engines
• Compatible Vehicles: Subaru Domingo, Subaru Justy
• Set Configuration: Three rings per cylinder
• Standard Size (not oversized)

Ring Set Composition:

• 1st Ring: 1.2mm x 3.0mm BF (Barrel Face) with SR chrome surface treatment
• 2nd Ring: 1.5mm x 3.3mm T1 compression ring with chrome treatment
• Oil Control Ring: 2.8mm x 2.8mm NIFF-S with SR chrome surface

Key Features:

• High-quality steel and cast iron construction engineered to OEM specifications
• Chrome surface treatments for superior wear resistance and durability
• Precision-manufactured to Japanese Industrial Standard (JIS) B8032-6-1998
• Provides excellent gas sealing, oil control, and heat conduction
• Direct replacement for OEM part numbers 48003-5800 and others

NPR piston rings are known for reduced oil consumption, improved compression sealing, and extended service life. Each ring set is designed to meet or exceed original equipment specifications, ensuring proper fit and optimal engine performance. This standard-size ring set is ideal for engine rebuilds and performance restoration applications.