Yes, they are old news and are pretty much crap. They turn your existing WEAK open differential into a jerry rigged Limited Slip Differential. I say they are crap because they use the existing differential that is still weak. Spend the extra money and get the Quaife. The install of the Quaife is actually easier since you simply replace the existing differential and shim it. With this kit, you must spend the same amount of time taking the tranny aparts, except you then have to "rebuild" the stock differential.