Put the RTR splitter on today, along with the undertray extension. First off, I didn't take the front end off. Not sure if that is necessary... there are only 2 of the clips that are a bit hard to get to. Only took about an hour for the splitter itself... the undertray was a bit more work. The splitter looks great and fits well. By itself it has a bit of flex, which the undertray really stiffens up. The fit of the undertray could be better. The drivers side fit up great, and everything looked good. But when putting in the passenger side, it looked like it could use a bit more room in the groove on the right side of the driver's side piece, as the passenger side piece was a little to far to the right. Loosened the screws and got it over enough for holes to line up, but the right side of the passenger piece wouldn't allow the lip to sit flush on that side. I ended up shaving about 1/8" from the right side of the bottom lip of the splitter so it would sit in the lip in the undertray like it should. Finally got all of the screws in and looked pretty good, except the holes for the plastic rivets were off. The one on the driver side were extremely difficult, and passenger side was impossible. Had to open holes up a bit to get the rivets in... after ruining a couple trying to get them in. @ RTR, GOT A PART NUMBER FOR THOSE? I may have to drill some new holes with some new rivets to hold better. It is in place and holding, but some of the rivets look as they could pull out at anytime. Overall looks great and will have to see how it holds up.