Spend your money elsewhere
This thing doesn't do anything but whistle. Spend your money on a cold air intake or intake manifold spacer if you want a bit of extra torque and horsepower. I put on the cold air first so I know for a fact that if where the power came from. Absolutely no change after installing this expensive paperweight.
not what it sounds like
I bought this because it said it was a sealed air box with duct from up by grill. Not even close, where the stock box got air under right fender there a over sized oval hole in the new box that you can't tell if you even matched the two together any no seal there at all. Duck is a tray that fits on top the battery and has 2 side (an duct?) that supposed to match a hole in air box,well very half ass. I have a scanguage2 and air temp was cooler stoch then with this setup.
After installing these pipes I know I have gained something off of them. My turbos spool a little faster and knowing how smooth the bends are on the pipes with a larger diameter is a lot better on the performance. The install was pretty straight forward, after driving it I came back and made some small adjustments. Good addition to my truck.