How tall are your Stacks on your truck?

As long as you are under 13’6 you’re fine. Your dryvan is most likely 13’6 as well. You won’t have any problems just use common sense when you see tree branches hang low. My old truck had 13’6” stacks and it was legal but there were a few times I brushed some branches. No damage or anything but you need to be aware. My new truck is a w9 as well and the stacks are mid roof height (haven’t measured) and like them a lot more. As for straight pipes it depends on wether you still have the restrictions under the cab. If it’s wide open your exhaust will sing crazy loud. It’s the high pitch whistle similar to the turbo sound that drives some people crazy.

 

Vehicle Height

FEDERAL REGULATIONS: No federal vehicle height limit is imposed.
STATE LAW: 13 feet on state highways; 14.5 feet on NHS highways​

- Size and Weight Limitations | Colorado General Assembly | Source: Sections 42‑4‑502 through 42‑4‑509, C.R.S.

 

Here's a tip, make your CB antenna a little higher than your stacks that way you'll know when you don't have enough clearance.My stack reaches the end of my exhaust which is under the truck.I think it's about 14'.

 

Ive run 13.5 stacks. It's company stuff. Little tiny two inch muffled pipe. Better would be two pipes.

Im deaf so straight pipe don't bother me. It bothers everyone else at o dark thirty. =)

 

Tips of my stacks are 10'0"...and they've never been a problem.

 

10'8" on mine. They need to be low to fit in the one cement mill I load at. Otherwise, they'd have been 12'6, like they were from factory

 

Mine are 13’4”

 

Nice! Who makes those.

 

Lincoln Chrome. Texas chrome shipped them to me.