Looking for a direct replacement for your old injectors? Check out our new Alliant Power AP63803 AD Injectors! These injectors are designed to fit 1999.5-2003 7.3 Powerstroke engines and meet all OEM specs and quality standards. With a set of eight injectors, you'll be able to get your engine running like new again. Don't trust just any aftermarket parts - trust Alliant Power to keep your engine running smoothly.