I have never written a review before, but these deserve it. I am a farm mechanic and try to do all of my own vehicle work also. I am always skeptical of after-market parts and "miracle fixes". This went on in 5 minutes. The hardware was good, the holes lined up & threaded right in after blowing out holes with air and adding anti-sieze. Leak stopped and I consider this fixed. I was gong to remove the inner fender and probably twist off the rest of the remaining mounting bolts and have hours of work ahead of me. The 300K + miles on a 5.3L in a Tahoe had the exhaust manifold mounting bolts popped off in all 4 corners front and rear. I installed this kit on the RH front, along with the 917-142 on the RH rear. I am ordering another of each Doorman kit to do the other side today! I don't think I have seen many products where everyone was so positive and it always has a five star rating. This product deserves it!