All you need to do is buy TRD springs and the dealer will have to warranty. They warranty my rear axle with the TRD springs I installed. If your in AZ I have this spring compressor. Need help paying for so I do side jobs.When I bought my 2 xB's, they came with LIFETIME oil changes and they include rotating the tires with each oil change (At least for now on the rotate)..... Helluva deal in my opinion. Oil ain't getting any cheaper, so an average oil change for folks who pay for them or do their own, will always be more than I pay.... I am planning on having mine lowered at the Dealership so I can maintain the warranties on all the suspension components while having it lower. I don't need it any lower than the Toyota stuff offers. If I ever pay it off (before trading on another awesome Scion), I'll probably even put air ride on it.... but that's a few years away.