Review on Circuit Performance Chrome Bolt-in Flush Mount Valve Stems (Set of 4) - Enhance Your Wheels with Stylish and Secure Upgrades! by Kris Martin

I'm a Toyota mechanic and had no trouble installing it, the only problem I had was the stem you use to fill your tire with air. The first time I used them they bent so I had to straighten them a few times to be usable and then when it was usable all the air sensors I used leaked air because the needle was too long, after it has been sharpened by about 1/8 inch and inches or more it works properly, you need to make the stem valve out of something stronger and work on getting the size right after that it's a great product.