im wanting to do some kind of front fender exhaust and i dont know the diameter of the pipe and i want to have an idea on how to do it i have the two possibilities if what im wanting drawn below (ultra realistic) any help would be appreciated ps im still running stock manifolds oh and emissions dont exist in my state so no worrys about cats and other lame things like that

 

Gonna be some short pipes.... which means, it'll be LOUD..... That, and I think federal law requires the exhaust to exit behind the cab.....

 

hey aint no feds gonna stop me plus with the amount of hood stacks in my area i think ill be okay

 

Legal-wise (separate from smog testing) you may be required to have a muffler/silencer. Some jurisdictions recognize a turbo as a silencing device.

I think you have enough leaf spring height that you can sneak the pipe out just ahead of the shackle. The manifold outlet is probably 2" or 2-1/4".