Earl's Performance Ultra-Flex Crimp-On AN Hose Ends

Earl's Performance Ultra-Flex Crimp-On AN Hose Ends are the dedicated termination solution engineered exclusively for Earl's Ultra-Flex 650™ (Kevlar braid) and Ultra-Flex 660™ (304 stainless steel braid) PTFE hose systems. Developed with professional race teams in mind, these hose ends represent Earl's lightest and most flow-efficient approach to high-performance engine plumbing — a standard backed by the brand's five-decade legacy of bringing aviation-grade fluid transfer technology to the automotive performance market.

Key Features:

• Full-assembly PTFE performance — the smooth bore advantage of the PTFE hose does not stop at the hose; it continues through the hose end body itself, eliminating the flow restriction point common in conventional fittings
• Mil-Spec Type III hard anodized aluminum construction with exclusive PTFE impregnation significantly reduces fluid friction throughout the entire assembly
• Crimp-on design delivers the lightest possible connection method for race engine plumbing
• Reusable hose end body — only the crimp collar requires replacement when rebuilding assemblies, reducing long-term cost (crimp collars sold separately)
• Compatible with both Ultra-Flex 650™ and Ultra-Flex 660™ hose systems — one crimper and die set handles both hose types, simplifying your tool investment
• Handles a wide range of fluids including fuel, oil, water, methanol, and air
• Available in multiple AN sizes and bend configurations to suit any high-performance plumbing layout

What sets the Ultra-Flex hose end line apart is Earl's full-assembly approach to PTFE integration. Rather than smooth bore performance ending at the hose, the PTFE impregnation extends through the hose end body — delivering a complete fluid transfer assembly optimized for maximum flow efficiency and minimum weight. This approach meets the exacting demands of professional motorsport, where every gram and every percentage of flow efficiency matters.

Installation requires Earl's Ultra-Flex hydraulic crimping machine and the appropriate die set. Crimp collars are sold separately. Note: These hose ends are designed exclusively for Earl's Ultra-Flex 650™ and 660™ hose systems; use with other hose brands or types is not recommended.