TRD LED Taillights - will they fit?

Yes and no. They will bolt in but you will need to trim the upper edge of the bumper for them to fit. The 2011 and up taillights are similar to the Rumion ones and are shorter than the 2008-2010 ones.

Greg S said:

Yes and no. They will bolt in but you will need to trim the upper edge of the bumper for them to fit. The 2011 and up taillights are similar to the Rumion ones and are shorter than the 2008-2010 ones.

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See the difference here: 2011 lights on a 2008, the 2011 lights are shorter and leave a gap:
http://www.newscionxb.com/138-exterior-mods/8710-2011-tail-lights-my-2008-box.html

Like Greg S said, if you put 2008-2010 lights onto your 2014 you will have to trim your bumper. Also you may have to do some rewiring since the 2008-2010 do not have amber turn signals like 2011-present. For a list of the changes, see:
https://sites.google.com/site/brickpigs2011xb/home/what-changed-2010-2011