A Head Oil Drain Kit is a product designed by Franklin Performance to help reduce excessive oil build-up in the cylinder head of Nissan RB twin cam series engines.

Excessive oil build up is a common problem experienced on the drag strip, drift track and occasionally on the street.

This kit helps drain the oil back to the sump instead of building up in the head where it often ends up being forced out of tappet cover breathers and catch cans.

The head drain fitting features a compact and lightweight design. An 8AN O-Ring port is used to enable compact plumbing, and slotted holes allow multiple mounting options to suit all engines the Head Drain Fitting is positioned at an angle to achieve the required clearance around the gearbox.

To fit the oil drain the frost-plug at the rear of the head is removed and two M6 holes are required to be tapped into the rear of the head. The supplied 10AN weld-on fitting is required to be welded to the sump, or we have 10AN adaptors for RB26 rear turbo oil return ports which can be utilised on a single turbo RB26 engine.

Suitable for all Nissan RB20DE, RB20DET, RB25DE, RB25DET, RB26DETT, and RB30DET engines, including Neo engines.