I have the RSS skid plates on my Techart Lip (I was the first actaully. I asked them to design and manufacture one for it and Mike and his guys delivered). It works great on most lowered cars. Once you go beyond the standard 20mm lowering that most guys do, it's effectiveness is a bit reduced. Since my car is lowered beyond 20mm, I am now scraping the front end of the lip before even reaching the skid plates . This might be a new homework project for the RSS boys . It is a great product and I highly recommend it for anyone.