I'd like to know, because now I'm in a fix. I asked a retailer for a system that would fit my 2004 regular cab/flareside FX4. This was the system he quoted and shipped to me. I've had it for over a month waiting for time and good weather to install. I spent most of the day yesterday trying to install it, but the hanger on the very first pipe (after the cat) is too long to fit in the factory hanger. I took pictures and called Magnaflow. They washed their hands of it saying the system is only for EC/CC and they don't make a SIDO rear-exit catback system for a regular cab. Yeah, that's just great. Before I get caught up in the whole return shipping argument with the retailer I just want to know if anyone has made the system work on a Regular cab truck? It's a nice system and I'd really like to make it work. Oh yeah, it still has the problems with the rear hangers like every one has reported here, because I have a trailer hitch. Yeah...that's just great...