i dynoed 330 with intake, ECU, pulley, testpipes. i think those mods are the best HP/$$$ ratio. personally, i think exhaust is overated (unless you gut your cats and precats). especially after i just gutted my precats and saw that huge freakin' ceramic brick that's in there. i don't understand how an exhaust could do you much good with the precats and cats still intact. its a wonder any air could get through there? i'm going to dyno again now that my precats are gutted. then i'll add an exhaust and compare the 3 dynos. should be interesting...