Altrom (ATM, Ultra 8) parts are rebranded oem supplier parts. See my picture as an example and notice the part numbers.. nsk is a oem provider for lexus/toyota pulleys. So is ntn but that's not important.. I realized this when buying sway bar links for my 01 tundra, the ultra 8 ones were insanely good quality and looked just like dealership ones. This pulley in my photo is for my 94 ls400 (yes i know, I have a great taste in vehicles ......)