The High Speed Engineering Nissan Pulsar GTI-R SR20DET Billet Oil Pump Upgrade Kit is engineered to eliminate the well-known failures associated with the factory GTI-R oil pump. Designed specifically for the RNN14’s unique front-drive SR20DET layout, this kit replaces the fragile OEM sintered gears with ultra-strong EN26 billet steel components and upgrades the crankshaft drive to a reliable, positive-locking spline system.

This upgrade is essential for any GTI-R build increasing RPM, boost pressure, or power output, dramatically improving oil pump stability and long-term engine reliability.

Compatibility:

• Designed exclusively for the Nissan Pulsar GTI-R (RNN14)
• Suits the SR20DET GTI-R engine with the unique front-wheel-drive oil pump design
• Direct fit into the OEM oil pump housing
• Suitable for street, track, rally, and high-power motorsport builds

Key Features:

• EN26 Billet Steel Gears: Replaces the factory sintered gears with ultra-high-strength billet steel for extreme durability under high load.
• Splined Drive System: Converts the OEM flat-drive engagement to a robust splined interface, eliminating the risk of drive failure at high RPM.
• CNC Precision-Machined: Ensures perfect gear mesh, consistent tolerances, and smooth operation across all engine speeds.
• High‑RPM Reliability: Stabilises oil pressure and prevents gear shattering — a common issue on the GTI-R at elevated rev limits.
• Direct Replacement: Installs into the standard pump housing with no external modifications required.
• Motorsport Ready: Suitable for rally, circuit, sprint cars, drag racing, and competitive GTI-R builds.

Why the GTI-R Oil Pump Needs Upgrading:

• The OEM gears are sintered and prone to shattering during high-RPM shifts, limiter abuse, or increased power levels.
• The flat-drive crank engagement wears prematurely and can slip under heavy load.
• Loss of oil pressure leads to catastrophic bearing or camshaft damage.
• Billet gears and splined engagement eliminate these weak points entirely.

The High Speed Engineering Billet Oil Pump Upgrade Kit is a critical reliability enhancement for any serious Nissan Pulsar GTI-R SR20DET build. Whether your aim is street performance, rally competition, or high-boost tuning, this upgrade ensures stable oil pressure, increased pump durability, and confidence at high RPM.

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.