Let me start by evaluating myself. Professionally I have been working as a car mechanic for many years, privately even longer. I've never written a one star review, I'm usually happy with what I get to work even if it takes more effort on my part than I reasonably expected. I've done everything from a complete overhaul to an oil change and everything in between. However, this product is the worst. To be clear, this is perhaps the simplest concept for a truck part. The spacer that you install between the lower shock/strut mount and the lower control arm. I'm not talking about a two or three inch lift here, it was a simple attempt to raise the front of my 2015 Silverado just an inch for better ground clearance and attractiveness. I was expecting to spend 30 minutes to an hour installing this, having previously swapped out struts and arms on similar vehicles. The problem, it turns out, is that the spacer cutout isn't deep enough to accommodate the lower strut mount. You can install this part, however the lower strut mount will contact the spacer and at a minimum squeak as the suspension moves and at worst rattle uncontrollably on rougher surfaces due to deflection of the lower strut bushing. Just add some more material and deepen the notch half an inch so it doesn't completely interfere with the lower strut bushing. I spent an hour installing them only to take them apart to try to cut deeper. After the second installation I was so dissatisfied with the result that I removed it completely. I recommend looking elsewhere for a 1" lift for your truck. I would suggest trying Supreme Suspension or any other manufacturer that knows a bit more about metal block machining and shaping (er, so disappointed in something so simple).