Most people never would require the extra tensile strength and clamp loading of L-19 over the standard 8740, so most rod manufacture just specify the ARP 2000 hardware but offer L-19 as an option for those who would require it/prefer it. I don’t know about Pauter, haven’t used them in a couple years for a build but they always came with 2000 for fasteners back then. Might be different now.