I have an 87 Sierra Step-side for offroading, its got a 4 inch lift with 37 Swampers on it. I plan on putting a snorkel on it and have been toying with the idea of stacks. I know everyone complains that stacks on a gas truck are pointless, but my reasoning is that it would look good on the truck and keep the exhaust out of the water/mud. I just wanted to know any ideas for pipe size and such that anyone has. and maybe any websites for snorkels/stacks cuz i really can't find any. Thanks

 

I like stacks. I don't know about on a gas truck but I just think they look SWEET!

 

i would say go with 6 in wide stacks.