Review on Denso IW20TT Iridium Spark Plug by Covey Palmer

I bought a set of premium spark plugs for my VW Vanagon as recommended on their website. When I went to install them I couldn't remove the ends of the electrodes as is required for installation on any old VW. I tried to contact Denso through their website and hadn't heard back for two weeks. I don't think spending $29 on a set of 4 forks is enough to get an answer. There was no phone number on the contact page but I finally found the phone number for the Ohio plant that I will call on Monday.