Selling a Brand New PLX M-500 Wide Band O2 Kit. It is Brand New and in the Box. You can connect this to a laptop and data log it in real time wirelessly. Don't have time to use it for my car, so I'm selling it. This piece retails for around 525.00. but willing to let it go for $400.00 Firm. Leave a post if interested or cal 783-1232.