Boundary | Nissan RB26 N1 Billet oil pump gears

Boundary oil pump gears are 100% manufactured in our Dallas, Texas production facility. We start by quenching our Chromoly billets from extreme heat and then temper them to a tough indestructible core. After machining, we apply our ColdFlow surface hardening process and complete it to a Mirror Finish. What does all this give you? It gives you a pump with stability over 9000 RPM, proven in excess of 2000whp, with higher efficiency, less friction, and backed by one of the industries best warranties.

Mirror Finished and Surface Hardened

Surface Ground gears for the ultimate in fitment and performance

Indestructible Chromoly core

Inner and outer gear machined in matched sets

Our own race-inspired gerotor design for flow and strength

Each set hand, machine, and hardness inspected with Blueprinting Report

FITS: RB26 N1 OIL PUMP HOUSINGS