Ultima 2M5538-030 Piston Ring Set — 4.0 Bore,.030 Oversize

Ultima 2M5538-030 is a moly piston ring set engineered for a 4.0-inch bore with a.030 oversize, delivering precise sealing and reliable performance in high‑output Twin Cam engines. Designed for 4.0-inch bore applications, this kit is built to enhance power and efficiency when rebuilding or upgrading your engine.

The set includes two 1/16-inch compression rings and one 3.0mm oil ring, arranged to optimize sealing, oil control, and consistent cylinder lubrication under demanding conditions.

Manufactured in the USA with durable materials, these rings are designed to meet or exceed OEM standards, making them suitable for big bore Twin Cam engine rebuilds and performance upgrades. Installation is straightforward, with a precise fit that supports reliable operation and long service life.

• Bore Size: 4.0-inch
• Oversize:.030-inch
• Ring Types: Two 1/16-inch compression rings and one 3.0mm oil ring
• Material Quality: Moly piston ring set manufactured in the USA
• Compatibility: Big Bore Twin Cam engine rebuilds and performance upgrades
• Installation: Easy, precise fit for reliable operation

Moly piston ring set is for 4.0 inch bore and is.030 oversize. Set includes two 1/16 inch compression rings and one 3.0mm oil ring.

Upgrade your engine with the Ultima 2M5538-030 piston ring set, designed specifically for 4.0-inch bore applications. This premium set includes two 1/16-inch compression rings and one 3.0mm oil ring, engineered to deliver optimal sealing and performance. Crafted in the USA, these rings are ideal for high-performance Twin Cam engines requiring a.030 oversize for enhanced power and efficiency. The set's precise fit and durable materials ensure reliable operation under demanding conditions, making it a trusted choice for rebuilds and upgrades. Installation is straightforward, and the components are engineered to meet or exceed OEM standards, providing peace of mind for enthusiasts and professionals alike.

Features:

• Bore Size: Designed for 4.0-inch bore engines

• Oversize:.030-inch for increased engine performance

• Ring Types: Includes two 1/16-inch compression rings and one 3.0mm oil ring

• Material Quality: Manufactured in the USA with durable, high-quality materials

• Compatibility: Suitable for Big Bore Twin Cam engine rebuilds and performance upgrades

• Easy Installation: Designed for precise fit and reliable operation