Bought it brand new and absolutely love it.
2013 Kia Optima (Remington Red)
Beside a KN filter, the only other change was that I added an inline fuel filter (paper element) in the PVC line to the turbo to collect oil blow by. Works wonders.
Raised the passenger seat about 2 inches so my wife doesn't feel like she is sitting in a hole. Made the parts needed myself with box steel purchased off Amazon for $12 and $10 worth of hardware from Ace.