The exhaust studs broke on my Expedition and I knew I had an expensive fix ahead of me. I was looking for new studs and came across this product on Amazon. I decided to give it a try. The product arrived exactly on time. The product is straightforward and instructions were simple. I am not the most mechanical guy but was able to install these in about 30 minutes. Most of the time was spent grinding down the broken original rusty studs a bit which I did with a dremel tool. The product worked perfect and after a month it is still perfect. Would DEFINITELY buy again.