I have an 04 Yukon Denali that will be going in for a transmission rebuild in a few weeks. The trans will be built with high energy bands, corvette shift servo, larger cooler and some other "heavy duty" parts. I figured while it's out I should do a few of those "since I'm already in there" things. I'm looking for suggestions on a deeper trans pan, off-road y-pipe and maybe headers. I'm looking into a BB tune and an e-fan too. Right now my only engine mod is an intake and aluminum radiator.