The interior is factory I'm guessing it is part of the Fx appearance package. They install was very easy no issues other than I couldn't find some items in my garage and I had to go to advance auto part grab some 3M double sided adhesive and some wire ties. There are really no directions so if you have never messed with HID's it can be a tad puzzling but it is truely an easy install. The halos and leds had to tap into the parking lights wire and then bam you're good