Aftermarket Kinugawa Turbo Oil Pan Return Drain Plug Adapter Fitting 10AN No Welding SteelReplacement Part Number:315-04301-010, 31504301010Applications:Fit For all naturally aspirated to turbo conversion projects, the typical procedure involves drilling a hole in the oil pan and subsequently welding a plug or fitting for the turbo oil return.However, with this adapter, the process is simplified as it is a bolt-on type that eliminates the need for welding.Simply drill a hole in the oil pan, insert the bolt, tighten it securely inside the oil pan, and seal it.