Hello im new here.. I dont know if this post belongs in this area. I have a 2006 350z with 25k and 12 months ago started a full race build. I had an sr20det going in and was all mounted almost ready to go until I bought a vk for the Z. I got my VK motor dirt cheap with the wants to rebuild it. I got a box of bolts and misc. hoses from the seller and there was this silver metal ball. I know it is most likely related to oil pressure but I have no idea where it goes. On my SR it went into the oil plate and sat under a spring. Im am unfamiliar with this motor and would like to know where this ball goes and hopefully Im not missing the pressure spring. Thanks for the help in advance.