Increasing power on the Nissan RB26DETT requires more than just airflow upgrades. Larger turbos, higher boost, and more aggressive cams demand a corresponding increase in fuel delivery. The Tomei Fuel Pump Assembly (part number TB503A-NS05B) is a high-flow in-tank pump developed specifically for the Skyline GT-R R33 (BCNR33). With a rated flow of 276 liters per hour at 3.0 kg/cm², it provides a substantial increase over the factory pump while remaining quiet and relatively efficient in its electrical demand.
This pump is designed as a direct-fit assembly for the R33 GT-R fuel tank setup, making it a practical upgrade for owners moving beyond stock power levels. It supports the fuel requirements of many street and track-oriented builds without the complexity of dual-pump systems or extensive wiring changes. Tomei’s focus on reliable flow and controlled operation helps maintain consistent fuel pressure as engine demand rises, contributing to more stable tuning and safer operation under load.
At Terra Firma Automotive, we supply this genuine Tomei Fuel Pump Assembly as a proven fueling solution for R33 GT-R owners. Whether you are preparing a moderate power increase or supporting a more ambitious RB26 build, this 276 LPH pump offers a balance of performance, fitment, and everyday usability. Choose Terra Firma Automotive for authentic Tomei fuel system components that help keep your Skyline properly supplied.
- Genuine Tomei Fuel Pump Assembly
- Part Number: TB503A-NS05B
- Application: Nissan Skyline GT-R R33 (BCNR33) RB26DETT
- In-tank high-flow design
- Flow rate: 276 LPH @ 3.0 kg/cm² (approx. 42.7 PSI)
- Significant increase over stock fuel pump capacity
- Quiet operation
- Relatively low electrical demand
- Supports moderate to higher power upgrades
- Direct-fit assembly for R33 GT-R
- Helps maintain consistent fuel delivery under load
- Suitable for street and performance builds
- Reliable alternative to dual-pump setups for many applications
- Authentic Tomei performance component
- Available from Terra Firma Automotive
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