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Ross Nissan RB20 RB25 RB26 head drain adaptor 306000-16

Ross Nissan RB20 / RB25 / RB26 Head Drain Adaptor

by Ross Performance Parts
SKU 306000-16
$97.90 - $97.90
$97.90
$97.90 - $97.90
$97.90

The Ross head drain adaptor provides an additional oil return path for twin-cam Nissan RB20, RB25 and RB26 engines. It helps reduce oil collecting at the rear of the cylinder head, particularly with upgraded oil pumps or sustained high RPM use.

  • Part number: 306000-16.
  • Installs in the rear cylinder-head core plug opening.
  • Installation requires two drilled and tapped M6 mounting holes.
  • Includes a compact AN-8 fitting and an internal mesh screen.
  • Rotatable design supports flexible hose routing and firewall clearance.

Ross recommends a suitably sized cylinder-head oil restrictor when upgrading the oil pump. Confirm plumbing and engine requirements with your engine builder.