Boundary VQ-OPG-VHR Billet Oil Pump Gear for Nissan VQ VHR 3.5/3.7 L

Vehicle Fitment

• Nissan / Infiniti - VQ-series VHR engines (3.5 L & 3.7 L)
• Specific models: 370Z (2009+); Infiniti G37 / FX37 / EX37 / M37 (2009+); Nissan 350Z (2007-08); Skyline (2007-08); Fuga 350 GT (2006-08)

Features

• Billet chromoly inner and outer gear set for strength and durability
• ColdFlow surface hardening for enhanced wear resistance
• Mirror-finished surfaces to reduce friction and improve efficiency
• Symmetrical tooth profile to eliminate stress concentration points
• Race-inspired gerotor design for optimal oil flow
• Precision surface grinding for accurate meshing and high RPM stability
• Indestructible core from heat-treated billet
• Each gear set hand-machined, hardness-inspected, and comes with a blueprint report

Specifications

• Part Number: VQ-OPG-VHR
• Material: Chromoly billet
• Manufacturing: ColdFlow hardened surface
• Design: Gerotor gear set (inner + outer)
• Finish: Mirror-polished
• Rated for high RPM (race / high-performance use)
• Designed for VQ VHR 3.5 L & 3.7 L engine variants

Included Components

• 1x Inner gear (billet)
• 1x Outer gear (billet)

Product Description

The **Boundary VQ-OPG-VHR** is a high-performance billet oil pump gear set designed specifically for Nissan's VQ-series VHR engines (3.5 L and 3.7 L). These gears are built from chromoly billet, heat-treated, and surface-hardened, giving them the strength to reliably perform under high RPM and high-power conditions. The gerotor design ensures efficient oil flow, while the symmetrical tooth profile enhances durability by reducing weak spots common in weaker gear designs.

With its mirror-finished surfaces and precision grinding, this gear set offers lower friction, reduced internal losses, and stable operation even at very high engine speeds. Ideal for race builds, high-performance tuning, and engines that see heavy stress, it's a direct-fit upgrade for VQ VHR applications. Each set is inspected and tested to provide both performance and reliability.