Sunnen N37J65 Grit Cylinder Honing Stone Set - 280

The Sunnen N37-J65 is a professional-grade 280 grit honing stone set designed for precision cylinder finishing. This fine finish stone set is engineered for cast iron cylinders ranging from 3.5 inches to 5.5 inches in diameter, making it ideal for automotive engine rebuilding, performance machining, and cylinder restoration work.

Key Features:

• Complete 4-piece set includes 2 honing stones and 2 aluminum wipers with integral holders
• 280 grit abrasive produces a smooth 20 Ra surface finish
• Compatible with both Sunnen AN-style and Goodson GH hones
• Suitable for cast iron cylinder applications
• Replaces legacy Sunnen part number AN-501

The N37-J65 honing stones feature premium construction with integral holders for secure installation and consistent performance. The 280 grit specification makes these stones perfect for final finishing operations, delivering the precise surface finish required for proper ring seating and oil retention in rebuilt engines. Whether you're working on automotive, marine, or small engine cylinders within the 3.5 to 5.5 inch bore range, these Sunnen stones provide the quality and reliability demanded by professional engine builders and machine shops.