Hastings Rings 3-5/8 Inch Shovelhead Piston Ring Set (2M5721) — Standard Size

Designed for 3-5/8 inch bore Harley-Davidson Shovelhead engines, this Hastings moly piston ring set fits models manufactured from 1966 to 1984, including FL, FX, FLT, and FXR. The spigot holes are enlarged to approximately 3.875 inches, providing a precise fit for standard-size rings in dual-piston configurations.

• Includes two piston rings for dual-piston engines
• Moly top compression rings, 1/16 inch
• Chrome oil rings
• Cast iron construction
• Piston-to-wall clearance: approximately.0025 to.003 inches
• Made in the USA
• Part number: 2M5721

Applications include restoration projects and performance upgrades where a precise, durable seal is required for 3-5/8 inch Shovelhead cylinders. The set is designed for straightforward installation with the provided online instructions and recommends using tools such as piston ring installer pliers, ring compressor kits, and piston pin support plates to ensure a smooth process.

Hastings moly piston ring set is for a 3-5/8 inch bore and is standard size. Features moly top compression rings with the size of 1/16 inch and chrome oil rings.

The Hastings Rings 3-5/8 inch Shovelhead Piston Ring Set is designed for seamless installation on Harley-Davidson Shovelhead engines with cylinders measuring 3-5/8 inches in diameter. This set is ideal for engines where the spigot holes have been enlarged to approximately 3.875 inches, providing a precise fit for models manufactured between 1966 and 1984, including FL, FX, FLT, and FXR series. The set includes two piston rings, ensuring compatibility with dual-piston configurations, and is suitable for both restoration and performance upgrades.

Made from high-quality cast iron, these piston rings maintain a consistent piston-to-wall clearance of approximately.0025 to.003 inches. This precise clearance ensures optimal sealing, combustion efficiency, and longevity of your engine components. The product's USA origin guarantees adherence to strict manufacturing standards, offering reliability and durability for your motorcycle rebuild or repair.

Installation is straightforward with the provided instructions available online. Proper tools, such as piston ring installer pliers, ring compressor kits, and piston pin support plates, are recommended for a smooth installation process. Accessories included in the accessory items list enhance compatibility and ease of assembly, making this set a comprehensive solution for your engine overhaul. Ensure your Harley-Davidson engine performs at its best with the Hastings Rings 3-5/8 inch Shovelhead Piston Ring Set, engineered for precision and longevity.

Features:

• Designed for 3-5/8 inch cylinders with spigot holes enlarged to 3.875 inches

• Compatible with Harley-Davidson Shovelhead models from 1966 to 1984

• Includes two piston rings for dual-piston engine configurations

• Cast iron construction ensures durability and consistent piston-to-wall clearance of.0025 -.003 inches

• Made in the USA with strict manufacturing standards

• Easy installation with included instructions and recommended tools