I have the 4.8is, and they tell me I need to order front and rear fender flares @ $220 each set to replace the 4.8is flares, then to buy the oem r/bs for $600, plus 5 hours of labor. I'm pretty handy and my best friend is a mechanic, so I could save on labor. The previous threads here say the same thing about the extra price for fender flares.