Well i just pulled the trigger. Was on ebay and i found a lightly used H&S XRT pro and put a bid on it. I ended up winning it for $410. The next step is either a DPF delete pipe, or some kind of catback exhaust. I am curious about the intake though. I see lots of people upgrading their intake. I remember when i had my 6.0 that a aftermarket intake wasnt really necessary unless you were making over 500. Is it the same for the 6.4's? Would i see a nice increase in performance if i upgrade to an aftermarket intake?