Well, I finally had my new Injen exhaust installed on my '08 TRP! Sounds real sweet! And the guy at the muffler shop only charged me $32 bucks! Took him all of 30 minutes to install. My E is a 4WD and the exhaust was a straight forward bolt in unit. Will be interested in seeing if this does anything to my mileage. Speaking of mileage, I'm getting around 26 MPG right now with mostly highway driving, 60 MPH, and with the air on. I'm still thinking about a taller tire. Will have to wait for that. I also installed the driver's armrest/storage unit, so I have a used OEM driver's side armrest for sale-like new and in great condition(okay, it has some dog hair on it-I'll clean that off!).