My 07' 5.9 with 325K on it still has plenty of life in it if I could find some decent injectors to purchase . It seems the folks at Diesel Logic are making and selling them as quality injectors . I've got the 2nd set in 3 years in my truck now , and from all indications , I'll be installing another set soon . The first set were 50 over , they improved my performance and I liked the way it run . Only problem was one went out 1 month after the warranty ran out . So , I bought a set of stock injectors and installed them . Again the truck ran fine , BUT , 2 months ago my truck died in a busy intersection in Frisco Texas at 4:00 . Not a good time or place !!! After 400 dollars in tow bills and downtime of 2 months After replacing the #5 injector , the CP3 pump ( which wasn't necessary ) and replacing the fuel rail , It fires right up and runs fine No big deal except for the customer service at Diesel Logic will not let me speak with anyone and she won't tell me who is the person to talk to . I wasn't an ******* when I called today . But , who knows what tomorrow brings . Or am I way of course with my thinking ? If I were to install plumbing that only last maybe a year and a half I wouldn't have been in business for over 30 years . Does anyone know who can talk to me with some communication skills and can make decisions . I'm out way more than the 4K the 2 sets of injectors cost .