I want to put a single 6" mitre cut stack on my truck but I only have one concern. Is there a way for rain to drain out of the lower pipe? Or does the exhaust blow the water out?

 

Drill a hole at the elbow or the turn down and it will drain

 

i've got stacks on mine but the rain doesn't get in mine near as bad as the slanted type but they still do, i used to use 5gal buckets on mine to keep the rain out but not much gets in mine so usually when i start it, it just blows it out....now if you let it sit for a couple days in the rain it might be alot worse but not sure,......also another thing, might just be me, but i think 2 stacks look better than the one but thats just my opinion
anyway you do it, itll look good cause its a dodge lol

 

How about drilling a hole at the elbow, like watermelon said, but also weld a nutaround the hole so that you can plug off the hole with a bolt?

 

The nut/bolt idea might work, but it'll probably unscrew and shoot out from the vibration/exhaust pressure (personal expirence with an O2 bung plug on a 4cyl). I ended up welding the bolt in place. A welded drain valve might be better.

IMO I think the water would evaporate at running temp anyway.

 

this is true, but what happens is the soot that collects in the exhaust will get washed and mix in the water. when you fire your truck up it will blow this thick black gooey crap all over the place. this stuff is hard to wash off. I see this every time we fire up the duces at my national guard unit and make it a point to park my hemmit away from them.

 

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dude honestly, just drill a couple freakin 1/8 holes in the bottom of ur elbow...i have miter cuts on mine and the soot does come out but very little, and yes it is a pain but its not a big deal