Great place for diesel smog. Will be my smog spot as long as I continue to stay in Vegas. The tech knew exactly what he was doing and I can't appreciate that enough as a diesel guy. My 2003 Ford 7.3 didn't come from the factory with a catalyst and he was already aware. The last place I went to gave me all kinds of hassle and I decided to leave and try Smog Xpress. Glad I did.