I have a 1st generation Toyota Tacoma. The truck was originally purchased with a SNUG TOP RV body. I had to replace the original pillars holding the rear window. It was quite difficult to find original parts with a good top. As a top addict, it seems I turned to Amazon for a cure. I tried these racks and they fit perfectly. The original tight top was C16-21704. These posts are strong enough to hold the rear window of the RV hull. Be careful first, the jambs are strong enough to knock your teeth out with this window if you open it. Happy with this purchase.