Hastings 2C4737 4-Cylinder Premium Ductile Piston Ring Set STD Bore

The Hastings 2C4737 is a complete 4-cylinder piston ring set designed for standard bore (STD) engines with a 3.071-inch (78mm) cylinder bore. Part of Hastings' Premium Ductile Ring Sets line, this kit includes all rings needed to properly seal pistons to the engine block across all four cylinders.

Hastings has been an industry leader in piston ring engineering and manufacturing since 1915, producing rings for automotive, heavy-duty, marine, motorcycle, and performance racing applications.

Ring Specifications:

• Top (Compression) Ring: 1.5mm thickness, grey iron construction with chrome facing surface treatment
• Second Ring: 1.5mm thickness, grey iron construction with phosphate surface treatment
• Oil Control Ring: 3.0mm thickness, steel rail / stainless expander construction with chrome facing surface treatment
• Cylinder Bore: 3.071 in. (78.00mm) — Standard (STD) size, not oversized
• Cylinder Quantity: Covers 4 cylinders (sold as 4 complete sets)
• File Fit: No — pre-gapped for direct installation
• Gapless: No
• Gas Ported: No

This ring set is a direct-fit, standard-size replacement suitable for engine rebuilds and overhauls. Chrome-faced top rings provide excellent wear resistance, while the phosphate-coated second ring promotes quick seating and long service life. Cross-reference: SWT20063, SWT20063AA, SWT20063AB, SWT20063AC.