I know a guy that makes them and sells them for way cheaper then the hyper ground kit. I have them on my civic and I noticed a diffrence in mid-range power. It will make a diffrence and it did on a 2000 Ford Focus with nothing else done. It gained 5 horses to the wheels. I would recommend getting these. If you would like me to contact him I think he sells them for like 55 dollers then please e-mail me at
[email protected] and I will hook you up with him.