I beleive the only difference is the 2011 has 2 track protectors welded to it&the 2006 does notLooking to help a friend replace a front Heat exchanger on a 2011 RS venture and his part number is different from the one I have from a scrapped sled one part is 8ET-12440-00-00 and the other is 8HF-1244-00-00 they look the same on the parts diagram but has anyone came across this ? Or if it will fit ? The donor sled is a 2006 RS Venture. Thanks for any input