So i got my oem rims painted metallic black nd i want some new extended lugs....i know that the oem rims use shank/washer lugs, can i use aftermarket lugs like blox or do i have to find shank/washer lugs

 

You "should" use the oem style as the rim is made for it. BUT alot of people use the acorn style lug nuts with the factory enkei rims, myself included. I have been using mine for 6+ years with no issues, others have autox and 1/4 their cars with no issues. I have even seen some get hardened steel seats installed into the factory rims to make the acorn style seat 100%

Best of luck with your choice and post up some pictures