Just a little background first. I'm a PS3 racer but don't let that fool you, I'm pretty serious about my sims. I have a homebuilt cockpit with a G25 wheel set up. I also have the Perfect Pedal brake mod which is a great add I must say. http://www.racedepartment.com/sim-racing-hardware/25-show-your-cockpit-124.html Who is ARC_Team? The G25 E mod comes from the ARC_Team out of Italy and they are pretty serious about sim racing too. I'll leave it at that and here is their website link if you want to know more. http://www.f1driving.it/ What is the G25 E Mod? The G25 E mod enhances the power that your G25 or G27 puts out to the FFB motors significantly. It uses a new power supply, booster circuit and modifies the circuit board by replacing resistors and other electronic components so the wheel can handle more power and remain reliable. It also modifies some duct work in the case(chassis) and adds some small fans to increase the airflow around the motors. My Impressions on the Mod: First of all, if this was a mediocre improvement I would not take the time to write this post. The FFB in the wheel has been enhanced quite significantly. So much so that a high speed spin in some cars can rip the wheel out of my hands. Because of the much enhanced FFB the communication to the road is also enhanced. Sensing limits in traction and bite is a breeze. Was that bump steer? Yes it was. Great add to my cockpit. I can't imagine anyone adding this mod and saying it wasn't worth it. Looking to increase the realism? Here you go. How it comes from ARC_Team: You can buy a complete wheel from them already modified. You can send your wheel to them, have it modified, and they will send it back to you. You can also buy a do it yourself kit if you are handy with a soldering iron and modifying a circuit board. I chose the 3rd option and it was a bit daunting. Fortunately, I had the help friends who work in the after-market auto electronics industry. My friends enjoyed the challenge but they are nerds(I mean that as a major compliment), but I was over my head. If I had it to do over again I would probably choose the 2nd option. Many of you PC builders may not be scared of this at all. Great mod and is like having a new high end wheel.