would a regular 4 in strait pipe cool the egt down as much as stacks cause with what I've been told the set up i'm going to be running is gonna run hotter than normal by a few 100 degrees
The more free flowing an exhaust is, the lower the EGT's are going to be...with that said, there is an upper limit to the effectiveness of this, and IDI's don't move as much air through the exhaust as a direct-injected engine that's putting out 30+ psi of boost is. The general consensus is that anything bigger than 3 1/2" is really not necessary for these trucks...some run 4" or even 5" exhaust because they like the sound or the look or such, but really, even a 4" standard exhaust with an inline muffler is going to be overkill for one of our engines. Also, if EGT's are a significant concern, investing in an intercooler would be a really good idea IMHO...it'll cost more, but it'll do considerably more to lower your EGT's than any exhaust system will.
also i'm not worried about the sound because my truck before was as ridiculously loud far louder than a 7.3 power-stroke with stacks... secondly i would take my truck off road cause before i was the pull truck when people got stuck cause nothing stopped her.
I'll say this...sound is pretty subjective. However, I've found that as I get older, I want a cab that's more quiet...being able to hear myself think has its benefits
I haven't ridden in a truck with stacks, but I've heard others say that it causes an obnoxious drone in the cab. At the same time, I ran my truck for about four years with only the downpipe and the exhaust exiting under the passenger's seat. I did it out of financial necessity, but it made the cab RIDICULOUSLY loud. By comparison, with a 3" straight pipe exiting in the stock location now, the cab's almost as quiet as it was when I was naturally aspirated and had a 100% stock exhaust system. You may not mind the loud cab now, but especially if you drive your truck long distance, I think the day will come when you will want the cab to be more quiet. At the very least, I would recommend experimenting a bit before shelling out big bucks for something you may not be satisified with in the long run.
and currently i live in south jersey and we get up to 2-3+ inches of rain every few weeks usually however next year i'm moving to new Hampshire where they get more snow snow which i assume is the same as water so let me know new to the whole stacks vs regular strait pipe
Actually, I think snow would be more of a problem with stacks than rain would be...before it melts, it might actually clog up the exhaust, unless you have caps or have them at an angle? So, IMHO that's an additional argument against stacks...although, to be frank, "I don't want to look like a tool" is enough fo an argument for me