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Find the thread, hose and assembly information you need for your next plumbing job. Lee Motorsports connects Finish Line Factory specifications with the parts in our store.
Find your technical guide
- AN fitting sizes, threads & torque
- NPT thread sizes
- Hose dimensions & pressure ratings
- Choose PTFE or rubber hose
- Crimp diameters
- Assemble swivel hose ends
- Assemble PTFE hose ends
Build the whole system
Start with the fluid and operating conditions. Identify the port thread, choose the correct hose family and size, then match the end style and assembly method. A shared AN size does not make rubber and PTFE hose ends interchangeable.
Fittings & adapters · Racing hose · Hose ends · Routing · Heat protection · Tools
Need help matching components?
Send Lee Motorsports the fluid or fuel blend, expected pressure and temperature, port thread, hose size and part numbers. Contact our team before ordering if the combination is uncertain.
These original Lee Motorsports guides reference FLF Racing Supply / Finish Line Factory technical information, checked October 6, 2026. Supplier conflicts are identified in the relevant guides; use current instructions for your exact parts.