Boundary VQDE40-S1-M VQ40DE Billet Oil Pump Assembly Stage 1 MartenWare Treated

The Boundary VQDE40-S1-M is a Stage 1 billet oil pump assembly engineered for the Nissan VQ40DE 4.0L V6 engine. This assembly starts with the Nissan OEM housing and is built up with Boundary's mirror-finished billet oil pump gear set and includes the optional MartenWare surface treatment for enhanced wear resistance and longevity under demanding conditions.

Key Features:

• OEM Nissan housing paired with a mirror-finished billet steel gear set
• MartenWare surface treatment applied for superior wear resistance
• Stainless Torx fasteners replace OEM hardware, torqued to spec with Loctite to prevent back-out
• Anaerobic sealant applied to critical sealing areas to boost pump-up speed and reduce aeration
• Assembly lubricant applied to all critical surfaces for fast oil flow on initial startup
• Each pump is completely disassembled, ultrasonically cleaned, air-blasted, hand-inspected, and hand de-burred
• Optional shim configurations available for elevated relief valve pressure settings (+10, +20, or +30 PSI)
• Every unit is blueprinted and shipped with an individual specification sheet

The VQDE40-S1-M delivers reliable, high-performance oiling for the VQ40DE found in the Nissan Frontier, Xterra, Pathfinder, and related platforms. Whether in a naturally aspirated or modified application, this pump is a direct-fit upgrade over the OEM unit, requiring no additional machining or preparation.