Fuel Lines

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Browse & shop Premade Fuel Line Kits for your car or truck.

Fuel lines are responsible for safely transporting fuel from the tank to the engine while maintaining proper pressure and flow. Upgraded fuel lines are commonly used in Subaru WRX and STI builds to support increased fuel demand, ethanol compatibility, and long-term reliability.

Compared to factory rubber fuel lines, performance fuel lines are designed to withstand higher pressures, elevated temperatures, and the chemical properties of ethanol-based fuels. This helps reduce the risk of fuel leaks, degradation, and pressure loss in modified fuel systems.

When to Upgrade Fuel Lines

Street-driven vehicles with mild performance upgrades may retain factory fuel lines without issue. However, as fuel system demands increase, upgraded fuel lines can provide additional safety and durability, particularly in ethanol or high-heat applications.

Performance-oriented builds often rely on upgraded fuel lines when running higher fuel pressures, larger injectors, or complete fuel system upgrades. These lines are commonly paired with upgraded fuel pumps, fuel rails, and proper fuel pressure regulation to ensure consistent and reliable fuel delivery.

Selecting fuel lines that are compatible with the intended fuel type and operating conditions helps maintain fuel system integrity and supports stable performance under load.