I went to the track last sunday, and my truck run 12.84, i been running this on nittos and slicks. I only have 8lb of boost, thats what both gauges read, i dont know why, i have ported the eaton with a 4lb lower, and long tube headers straight pipe and a flowmaster (ugh) but i like how it sounds, i think thats why i have low boost, oh and i have the comp cams stage 2, thats why i like how it sounds. I want to put a cat back and the 6lb pulley. I only got 406rwhp and 454rwtq. What ya guys think how much more horsepower i will get. and what kind of cat back should i put.