From what I've seen with the 11-12's, fittment issues were just tubing connectors that needed to be cut down. Even though the kit is a bolt on, there is some work that needs to be done to get the intercooler piping lined up properly so the intercooler will bolt in.
If you think that's bad... try squeezing brake ducts along with the intercooler piping in a manner that actually transfers air to the brakes. Took a lot of adjusting and cutting to fit it all on my Roush bumper cover.
It wasn't bad with just the intercooler piping.
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