Thorley sounds to be a popular header for these trucks. Lots of people are running them with no complaints, so i may be leaning that way, im not sure yet tho. Im pretty sure i would like the lower end "grunt". . but i'm sure either header will get the job done more so than the stock manny.. Anyways thanks everyone for the help so far.. <img src="/forums/images/graemlins/kewl.gif" alt="" />