All remanufactured PurePower Technologies® Piezo injectors are 100% tested for performance and replaced with new when necessary. PurePower Technologies has produced more than 30 million precision diesel fuel injectors since 1999. They do 100% end-of-line testing on OE manufacturing equipment. They perform advanced end-of-life test checks, delivery, leakage and opening characteristics. Remanufactured Piezo injectors are backed by 24-month, unlimited mileage warranty as well as our best-in-class technical support. Visit alliantpower.com for more information.