I have to drop the truck off wednesday night for a state mandated emissions/safety inspection (NYS guys know what I'm talkin about). My question to you guys is what , if anything does the muffler have to do with anything as far as emissions are concerned. Since I have pulled the muffler, and never had a cat on the 04 to begin with, I need ammunition against them if they tell me that I need a catalytic converter to pass. I seriously wonder if these "technicians" realize what years do and do not have converters. As far as not having a stock muffler, yeah, it can be loud, but nowhere near as loud as those damn bikes that race past my house at 2 am in the summertime.