I had the MBRP cat back kit installed on my truck last Friday. I did a good bit of research and listening to sound clips before ordering. I'm was aware of the EFM issues with sound so I can't complain about that. This system was marketed to be a mild sound and very little cab noIse. I was looking for something that you could hear slightly at idle and definitely hear when you put the peddle to the floor. This kit has an extremely loud cold start that I do t love and neither will my neighbors. It can also be heard in the background when I'm taking calls for work. The system sounds good. It's just much louder than I was expecting. Any suggestions on other mufflers or systems that will run quieter? I left my factory exhaust at the muffler shop and they scraped it. I'm looking to get a less aversive sound or just go back to g factory sound. Can I install a more factory muffler with the aftermarket kit? Looking forward to any suggestions. Posted a clip for sound on cold start and with throttle on.