Universal Turbo Oil Line Kit Feed Return Drain Pan Plug 4AN 10AN AN10 Oil Line Feed + Drain kit for Turbo Application This kit is most complete Oil line kit for NA to Turbo Conversion. No Weld is needed on the Oil Pan, All Bolt on. All flange/fitting are CNC quality, not the Cast Junk ones like others. Oil Feed is AN4, with AN4 oil feed line, AN4 oil Feed fitting with built in oil restrictor to provide proper oil to turbo. Drain is AN10, with AN10 drain flange bolt to the turbo and AN10 Bolt on adapter to oil pan (no welding).