As learned from John, I will never have a car (turbo or n/a) without a wideband. They are an extremely valuable tool for tuning. Without one, you are just guessing. For example, i am still running a little on the safe side and I am at 11.5 A/F at WOT. There is NO WAY you would ever know if you are running lean or rich without one. And we all know running too lean=BOOM. You can get a brand new Innovative Lc1 kit (with gauge,sensor and everything needed to hook up) for $187. You cant beat that.