I was a little skeptical to install exhaust on my 3.5 ecoboost, having always owned v8s. But I replaced my downpipes with ams high flows and came across Carven. I was very impressed with what I read on their website and the few videos I could find, the trucks sounded very good. So I purchased a system from them. Once received, ( which arrived very quickly) the quality is fantastic. The install was as straightforward as it could be, and the polished dual tip finished off the system perfectly. Upon start up I was extremely pleased- the truck has a very deep tone and with revs wakes up nicely. The best thing I love about the system is that there is no rasp at all. It has a very nice exhaust tone throughout the rpm range and I get no drone inside the cab. Once on the interstate allowing the transmission to get into 10th gear, interior sound is very quiet. I will definitely recommend Carven to anyone that is considering installing an exhaust on their ecoboost!!