C5/C6 2003.5-2013 Fuel Pump Kit - 525R
Extreme Performance Fuel System Kit
2003.5 - 2013 Corvette C5 / C6 (Excl. ZR1)
The Engineered Solution
The RFPK-475-525R is a complete fuel delivery system designed for forced induction and high-horsepower Corvette applications. By bundling the Walbro 525 (Hellcat) pump with our 10-gauge HD electrical backbone, we eliminate the bottlenecks that cause fuel starvation and engine damage. This is a return-style kit optimized for external regulation.
Horsepower Support Estimates
| Fuel Type | Naturally Aspirated | Forced Induction |
| Gasoline | 1100 HP | 900 HP |
| E85 (Ethanol) | 800 HP | 650 HP |
*Estimates based on 58 PSI base pressure. Actual support varies by BSFC, target AFR, and system voltage.
1. TU475-525R Module
- Genuine Walbro 525 (Hellcat) Pump.
- External Regulation Ready (-6 ORB).
- Retains full Jet-Pump functionality.
2. HD Electrical Bundle
- FPWH-008HD 10AWG Hotwire.
- IPH-008 10AWG Intermediate.
- Alternator-Direct Power & Relay.
Mandatory: Level Sensor Selection
To ensure accurate fuel gauge operation, you MUST use the drop-down menu below to select the correct level sensor for your vehicle's model year. Resistance values (Ohms) changed significantly across the C5/C6 production run.
Failure to select the correct sensor will result in incorrect fuel gauge readings.
Warranty & Technical Support
Components in this system carry distinct warranties:
- Fuel Pump Module: One-Year Limited Warranty. Full details here.
- Wiring Harnesses: Limited Lifetime Warranty. Full details here.
Mandatory Diagnostic Requirement:
Warranty claims are subject to proper diagnosis via our Technical Support Forum. Verified customers must utilize forum resources for system analysis before requesting returns.
REQUIRED PLUMBING:
This system requires an external regulator and return line. See our R-Series Fuel Line Kits (FLK) for PnP plumbing solutions.
C5 Corvette VIN Split: Fits late 2003 C5 Corvettes with VIN # 114931 and higher.
Exclusions: Fits all 2004-2013 C6 Corvettes EXCLUDING the ZR1 platform.
















