Turbo Oil Drain / Return Pipe Fitting to Oil Pan DIY (5/8 inch / 16 mm)Application All NA to Turbo Projects Needs to drill a Hole on the Oil Pan and then weld a plug or Fitting for the turbo oil Return. This adapter is bolt on type and doesnt need to weld. All you need to do is drill a hole on the oil pan, and then use the bolt to tight inside the oil pan and seal it. From oil Pan inside to outside (nut is on the outside of oil pan) Situation Brand New Kit includes 1 x oil drain pipe ( 5 8 inch 16 mm ) 2 x ring 1 x Bolt