Pretty vague on the intake. Ask for a flow sheet on it at 350 cfm doesn't mean anything without knowing the inches of water column. I am also not a huge fan of just flow rate, what was the port velocity? Slow velocity means lazy down low and high velocity means less lazy. You would need some AFE 205's or 225' or the like to keep up with the intake and at that point you better have some cubic inches and an rpm range from 3500 to 8000 to make it work optimally. Stick with an Explorer upper and lower and if you want to jazz things up send them to TMoss to port the lower and clean up the upper.