Boundary B18-OPG-M Honda B18 I4 1.8L MartenWear Treated Billet Oil Pump Gear

The Boundary B18-OPG-M is a precision-engineered billet oil pump gear designed specifically for Honda B18 I4 1.8L engines. This high-performance upgrade replaces worn or damaged factory oil pump gears, restoring optimal oil pump function and enhancing reliability for high-RPM applications and performance builds.

Premium Construction and MartenWear Treatment:

• Manufactured from heat-treated 4140 chromoly billet steel for exceptional strength and durability
• MartenWear dual heat treatment process creates an indestructible core while maintaining surface hardness
• ColdFlow surface hardening process provides superior wear resistance
• Mirror-finished surface reduces friction and improves oil flow efficiency
• Inner and outer gears machined in matched sets for precise tolerances and optimal performance

Performance Features:

• Proven stable operation over 9,000 RPM
• Tested in applications exceeding 1,000 whp
• Race-inspired gerotor design optimized for both flow and strength
• Surface-ground gears ensure ultimate fitment and performance
• Blue-printed design with precise tolerances for improved oil flow
• Direct replacement for OEM oil pump gears (Orbit pump housing only)

100% manufactured in Boundary's Dallas, Texas production facility using American-sourced materials. Each gearset is shipped with blueprinting documentation verifying precise tolerances. Ideal for performance builds, turbocharged applications, and vehicles operating at higher than stock RPM levels. Backed by Boundary's limited lifetime warranty.