The High Speed Engineering Nissan SR20DET S13 Billet Oil Pump Gear Upgrade Kit is engineered to eliminate the known weaknesses of the factory S13 oil pump. Early SR20DET engines are particularly prone to oil pump gear failure due to their sintered construction and limited strength under high RPM, high boost, or limiter abuse. This billet gear set provides a dramatic improvement in reliability, ensuring stable oil pressure and long-term durability for performance-built SR engines.

Designed as a direct-fit replacement for the OEM internal gearset, this kit upgrades the pump’s internal strength without requiring external modification to the S13 housing, making it ideal for both street and motorsport applications.

Compatibility:

• Suits Nissan SR20DET S13 engines (RWD)
• Direct fit inside the OEM S13 oil pump housing
• Compatible with high-revving, high-boost, and forged-engine builds
• Suitable for drift, circuit, drag and performance street applications

Key Features:

• EN26 Billet Steel Construction: Far superior to the fragile OEM sintered gears, offering exceptional strength and fatigue resistance.
• Precision CNC Machining: Ensures perfect gear meshing, improved tooth strength, and consistent oil pressure throughout the rev range.
• High-RPM Safety: Designed specifically to prevent the catastrophic oil pump failures commonly seen in modified S13 SR20DET engines.
• Direct Replacement: Installs into the factory S13 pump housing with no external modification.
• Improved Oil Delivery: Optimised tooth geometry and improved rigidity help stabilise flow at high engine speeds.
• Motorsport Ready: Suitable for engines making significant power increases or regularly running extended high RPM.

Why Upgrade the S13 Oil Pump?

• Factory sintered gears often crack or shatter under high RPM or increased load.
• Oil pressure instability can cause bearing damage, cam wear, or catastrophic engine failure.
• Billet gears offer vastly improved strength, reliability, and longevity.

The High Speed Engineering SR20DET S13 Billet Oil Pump Gear Upgrade Kit is essential for any serious SR20 build. Whether your goal is competitive motorsport or a highly responsive performance street engine, this billet gear set provides peace of mind and the durability required for demanding conditions.

Notes

• It is the engine builders responsibility to ensure that all components are clean, undamaged and free running BEFORE and AFTER installation.
• Gears must be assembled initially with clean engine oil or assembly grease. Do NOT run dry!
• With the inner and outer gear sitting in front of you and the nose/seal diameter facing toward you, the outer gear should be laid over the inner gear with the “wave” profile in a clockwise orientation. The 2 wave “points” should be facing in the same direction (see assembly instructions).
• These gears are direct replacements for standard gears. If something doesn’t fit easily, then something isn’t right. You should not have to modify the housing and once installed, the gears should spin freely, with no restriction other than the oil seal.