im putting 7" stacks on my powerstroke. i want the miter cut stacks. i wanted to know how they are after a rainy day or night, i have a white truck and was wondering if after rain and i started it and drove it if my truck would have spots of black soot all over it??

 

Yep you will have soot all over... Drill a small hole in the bottom of the stack where the water can exit but you will still have soot spots on your truck...

 

how bad is it can anyone post some close up pictures?

 

its not that bad unless you have alot of power and blow alot of black smoke, the only time mine got covered in soot was after i washed it so i let it run as i washed it, i never got soot after it rained but you could do like said above and drill a hole or two at the bottom to let the water drain out, you could go with flat tops and put tractor flaps on it?

 

Does bigger stacks make a performance difference

 

nope. but anything less than 4" could decrease performance.

 

Stacks def. help with power, egt's, and mpg's over the stock exhaust... stacks are also really loud and sound good on 7.3's

 

Really, You got better mpgs and more power with just an exhaust? Must have been a Banks kit...

 

i know people who have had lower EGTs with stock straight piped exhaust. you don't put exhaust on planing on getting better MPG, if you do you will be very disappointed. the stacks sound good from the outside but get very annoying in the cab. i cant wait to remove my stack.

 

i had a single bull hauler going straight back on my 94 and you couldn't hear it in the cab. but when it's a foot above the cab i guess you won't.