I was told that in ID the turbo qualifies as a muffler on the older rigs, not sure if it is true. I do know if you take it off it gets really loud. By the way the CAT is Federal Law and no one is allowed to remove it, if they decide to push it the fine can be steep ! Any smog device is covered by Federal law.
__________________
91.5 W350, SRW, 4X4, NV4500, Frantz, pump tweaked, boost and pyro,600k, 17"Rims, RV hauler