The plastic factory injector return fitting on the 2011 2016 6.7L Power Stroke is susceptible to breakage from heat, vibration, rough handling, and frequent disconnections for fuel filter maintenance. Upgrade this fitting and eliminate the risk of a broken fuel line with our heavy duty billet aluminum injector return fitting. Featuring a dual O ring internal design and serviceable barb fitting the Fleece Performance injector return fitting will ensure you ftre not left stranded with a broken, non repairable fuel line. Features Heavy duty, machined billet aluminum housing. Dual O ring internal design for increased sealing. Serviceable billet aluminum barb fitting. Easy to install and remove. Application Notes This kit is designed to work with both OEM and aftermarket under hood fuel filter assemblies including Fleece Performance P N FPE FMC UHFA 1123. A service kit is available for this product, Fleece Performance P N FPE FMC FF RLK 1116 SER. The kit includes replacement O rings and a locking tab. A replacement barb fitting is available for this product, Fleece Performance P N FPE AN4 332B.