Boundary High Efficiency Billet Oil Pump Drive Gears For LS9 Dry Sump Oil Pump (GM Part #12578147)
Billet sump and pressure rotors for the 2009-2013 Corvette ZR1 LS9, machined to OEM specs for race-ready oiling and durability. Cut from quenched-and-tempered Chromoly billet and ColdFlow mirror-finished to replace the OEM sintered gears. Made in the USA!
Upgrade your 2009-2013 GM Corvette ZR1 LS9 engine with the Boundary Pumps LS9 Sump Rotor and Pressure Rotor, engineered for precision and performance. Designed to fit seamlessly with OEM specs, this upgrade delivers enhanced oiling, improved durability, and race-ready reliability.
Boundary oil pump gears are 100% manufactured in their Dallas, Texas, production facility. They start by quenching our Chromoly billets from extreme heat and then temper them to a tough indestructible core. After machining, they apply their 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 industry’s best warranties.
Oil Pump Gear Features:
- 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
- Race-inspired gerotor design for flow and strength
- Each set hand, machine, and hardness inspected with Blueprinting Report
Optional MartenWear heat treatment for ultra-long wear debris resistant surfaces:
The MartenWear process was developed and is applied all in house at Boundary and is a 2nd stage of heat treatment that can be applied to their billet components. MartenWear heat treats the exterior surface of the part to be extremely hard and long wearing. This surface is more robust against debris ingestion and has been found to be wear free in all applications up to and beyond 13000 RPM.
LS9-OPG-SUMPROTOR Fits:
2009-2013 GM Corvette ZR1 LS9 Engine
LS9-OPG-PRESSUREROTOR Fits:
2009-2013 GM Corvette ZR1 LS9 Engine
Note:
A LS9 pump can be used in a LS7 engine to create higher flow. However, the crank sprocket must be changed to a LS9.
