Here is what I found out after doing said mods. The gains are very minimal but there are gains to be had. The whole point of the downpipe, intake, and intercooler piping is efficiency, if said mods are in place your car no longer has to work as hard to make the same power, this relieves stress off of the whole system as a whole. These mods allow the car to breathe. The downpipe you will definitely notice, the car spools a lot quicker and the torque comes on sooner, but this also leads to shredding the tires and makes 1st and 2nd gear useless unless you have strats traction control which is flawless. The charge pipes make a difference too I was skeptical, but the way I see that is the bigger, direct airflow and mandrel bent smoothness of the pipes allows the air to flow better, the bigger pipes actually slow the air just a little bit and allows it to stay inside of the intercooler just for a bit longer this leads to an even cooler charge, and because the turbo is so small and spools so quickly it has no problem at all filling those pipes, even if it did have just a little bit of lag I would give that up for more efficiency. The biggest thing about the charge pipes is most systems come with t bolt clamps which is awesome no longer do you have stock charge pipes blowing off and trying to fix boost leaks, and you can actually hear the air flowing through the pipes, some may like it, some may not. Don't think of the gains to be had really think of your car having a better healthier life because all the restrictions are removed