NPR SWT20048-4 Piston Ring Set Standard Bore - 86mm

The NPR SWT20048-4 is a complete piston ring set manufactured in Japan using premium steel materials, designed for professional engine rebuilds and high-quality aftermarket applications. NPR (Nippon Piston Ring Co.) has been supplying Original Equipment Manufacturers including Toyota and Lexus with the highest quality internal combustion engine parts since 1973, bringing decades of engineering expertise to every ring set.

Key Specifications:

• Standard bore diameter: 86.00mm
• 1st compression ring: 1.50mm
• 2nd compression ring: 1.50mm
• Oil control ring: 4.00mm
• 4-cylinder set (complete rings for all cylinders)
• Premium steel construction manufactured in Japan

Performance Features:

• Steel construction reduces ring wear by over 60% and provides 50% longer service life compared to cast iron rings
• Higher tensile strength, yield strength, greater fatigue life, and greater hardness
• Better conformability, superior oil economy, superior blow-by control, and lower friction
• Exceptional heat and wear resistance for demanding operating conditions
• Advanced surface treatments for optimal cylinder wall sealing

NPR piston rings are engineered to minimize friction and reduce engine component wear, extending engine life while maintaining peak performance. The precision manufacturing and quality control standards ensure proper fit, reliable sealing, and consistent compression across all cylinders.

Cross-Reference: Replaces Fel-Pro part numbers E92Z-6149-A and F2Y1-11-SC0