under the cab...... yeah..... it is great in theory... but if you drive your truck a lot you will find yourself always thinking about how loud it is...
I had mine dumping right under the cab, no turndowns.
I had to put some 90's on after the mufflers and point them to the side of the truck to even think about enjoying the ride.
Currently have it all redone exiting right in front of the rear tires..
I think they are perfect, loud when you want them to be, but they don't bug you while cruising on the freeway.
BEFORE
AFTER
Hope this info helps you decide, good luck... in the end, its your truck
so build it to fit "your" needs!
-=Scott=-