Boundary LS9-OPG-PRESSUREROTOR-M Billet Oil Pump Pressure Rotor MartenWear Treated

The Boundary LS9-OPG-PRESSUREROTOR-M is a billet oil pump pressure rotor engineered for the 2009–2013 GM Corvette ZR1 LS9 dry sump engine. This is the MartenWear-treated version of Boundary's precision-machined pressure rotor, designed as a direct replacement for the factory sintered/powdered-metal rotor. Built to OEM specs for drop-in fitment, this upgrade delivers race-ready oiling reliability and dramatically improved durability under high-RPM and high-boost conditions.

Every Boundary oil pump gear starts with quenched-and-tempered Chromoly billet steel—not powdered metal—machined to exacting tolerances at Boundary's production facility in Dallas, Texas. After machining, the rotor receives the ColdFlow surface hardening process and is completed to a mirror finish. The MartenWear treatment adds a second stage of heat treatment, further hardening the exterior surface for maximum wear resistance in demanding applications.

Key Features:

• Billet Chromoly steel construction — replaces OEM sintered/powdered-metal rotor
• ColdFlow surface hardening process with mirror finish
• MartenWear second-stage heat treatment for enhanced surface hardness
• Surface-ground for optimal fitment and performance
• Race-inspired gerotor design for maximum flow and strength
• Proven stable beyond 9,000 RPM and in excess of 2,000 WHP
• Each unit hand, machine, and hardness inspected with Blueprinting Report
• 100% manufactured in Dallas, Texas, USA
• Backed by Boundary's industry-leading limited lifetime warranty

The LS9 dry sump oil system's pressure rotor is a critical component for maintaining consistent oil pressure under the extreme demands of supercharged performance. Boundary's billet upgrade eliminates the failure risk associated with OEM powdered-metal rotors, making it an essential reliability upgrade for track use, high-horsepower builds, or sustained high-RPM driving.