i had a fass 150 on mine it was a good pump. but it was so dang loud it off i will be adding an airdog shortly they are so much more quiet. your other ? i say studs and no waste gate. from ppl i have talked too that ran them said they seen no help. still blew hg. if anything just leave your egr cooler in place i kinda think it works some what the same in a way.