Bought a 2011 WRX sedan used its got 30,000 miles! I am f@*#ing pumped! This is my second WRX and third subie. I just have a couple questions. It says on the original dealer sticker that it has the sti short throw shifter, i am wondering if the height is adjustable because the knob seems to sit very high. Also how do i know if i have HID headlights? and last but not least does adding a tune void warranty?