Fuelab Diaphragm and O-Ring Kit for 515xx and 525xx Series Regulators; Large Seat (Universal; Some Adaptation May Be Required)

Premium Replacement Components. The Fuelab Diaphragm and O-Ring Kit for 515xx, 525xx, and 595xx Series Regulators; Large Seat is designed to restore regulator performance by replacing worn or damaged diaphragms and seals. It ensures consistent fuel pressure regulation critical for engine efficiency and reliability. This kit is an essential maintenance item that helps prevent fuel leaks and regulator failure.

Construction and Appearance. Manufactured using durable materials engineered for fuel system compatibility, the diaphragm and O-rings feature a precise fit and resilient sealing properties. The components are finished with a clean, functional look suitable for professional-grade fuel system service and maintenance.

Installation. Installation is straightforward and typically requires no special tools or modifications. No drilling is necessary, making it suitable for mechanics with varying levels of experience.

Warranty. This kit is backed by a limited lifetime warranty, providing confidence in product quality and durability. Application. Fits large-seat models in the 515, 525, and 595 series regulators; universal fitment with some adaptation may be required.

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