Ok here is the background on the truck. 40kmiles everything orginal. Truck ran good (no noticable knock). Ran a couple 13.8's @ 97mph (before mods). I now upgraded with the following mods: KB CAI, Ultimate 3bar, KB FPR, Walboro 255, rerouted ic lines, 2 spal fans, 4 gauges (fp, oil p...