The Tygon formulation F-4040-A plastic construction is designed for use with various fuels and lubricants, including gasoline, kerosene, heating oils, cutting compounds, and glycol-based coolants. It resists the swelling, hardening, and embrittlement typically caused by hydrocarbon-based fluids.
 
This is the best fuel line for LO206 karting, and is used on all Manning Motorsports Engines.