Fuelab Diaphragm & O-Ring Kit for 515xx/525xx Series Regulators - Large Seat

Fabrication parts and materials provide the raw components needed to build, repair, and modify custom exhaust systems, turbocharger plumbing, intercooler piping, fuel system lines, oil routing, and engine bay heat management on performance and competition vehicles. Stainless steel tubing, titanium tubing, aluminum charge piping, mandrel bends, pie cuts, flanges, merge collectors, V-band clamps, O2 sensor bungs, AN fittings, PTFE hose kits, braided fuel and oil lines, heat shields, and welding supplies are the backbone of any serious custom fabrication project. Professional fabricators, race team mechanics, and advanced DIY builders who want full control over exhaust routing, charge pipe layout, or fuel system plumbing choose raw fabrication materials rather than pre-bent kits because custom fabrication allows fitment solutions that no universal kit can accommodate. Brands including Vibrant Performance, Ticon Industries, Stainless Bros, Radium Engineering, Fragola, and DEI provide th...

Fuelab has established itself as a premium manufacturer of precision fuel system components designed for high-performance EFI applications where conventional fuel system hardware falls short under sustained high-load conditions. Known for their billet aluminum construction, tight pressure regulation tolerances, and comprehensive AN-ported product line, Fuelab components are used by professional race teams and serious street performance builders who demand measurable fuel pressure stability across the full RPM and load range. Every Fuelab product is engineered with a focus on internal flow efficiency, with oversized passages and precision-machined valve seats that minimize pressure drop while maintaining regulation accuracy. Whether you are building a naturally aspirated high-revving engine or a high-boost forced induction platform, Fuelab offers a component for every position in the fuel system from tank to rail. Popular Upgrades Top-selling Fuelab products include the 515 Series ad...

Welcome to our O-Rings collection, where you will find a diverse range of high-quality O-Rings designed for durability and performance. Whether you need these essential sealing components for mechanical, plumbing, or automotive applications, we have you covered. Why Choose Our O-Rings? High-Quality Materials: Our O-Rings are made from premium materials to ensure longevity and reliability. Variety of Sizes: We offer a wide range of sizes to meet your specific needs. Temperature Resistance: Designed to withstand extreme temperatures for various applications. Easy to Install: Our O-Rings are user-friendly and can be easily installed in any setup.   Applications of O-Rings Our O-Rings are versatile and can be used in various applications, including: Mechanical seal applications Automotive repairs and maintenance Plumbing and water systems Hydraulic and pneumatic systems   Shop Our O-Rings Collection Now! Browse through our selection of O-Rings and find the perfect fit for your n...