The EPA requires all primer bulb assemblies to utilize low permeation components to reduce pollution causing hydrocarbon permeation through the hose and/or primer bulb by as much as 85%. In response, Sierra introduced a new EPA approved primer bulb that exceeded the mandated permeation rate while maintaining Sierra's traditional look, feel and operational characteristics. manufactured from a unique FKM material, Sierra's primer bulb meets both EPA and carb standards while providing outstanding warm/cold weather flexibility. The Silverado 4000 is a rubber fuel line with fabric reinforcement that features a PVDF layer to prevent permeation. Designed to meet all EPA/carb requirements and compatible with all blends of ethanol reformulated fuel, the Silverado 4000 is extremely flexible and kink resistant in all weather conditions. Has 3/8" female connector on engine end and 3/8" connector on fuel connector end.

 PROP 65 WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov