We carry stock replacement and high performance injectors for the 2011+ Ford 6.7L Power Stroke engine. Signs of worn injectors may include excessive smoke, rough idle or a light "miss", low power and poor fuel economy. LMM owners can extend the life of their injectors by using Stanadyne Performance Formula with every tank of fuel. Clean fuel is very important, so changing your fuel filters at the recommended intervals is critical. Adding an aftermarket fuel filter or a FASS will also extend the life of your injectors.