The best braided fuel lines and hoses for a Subaru WRX are vehicle-specific feed line kits that match the factory routing, use the correct fittings for the car, and replace aging rubber sections with a reinforced line built for fuel delivery. For the 2015-2020 WRX, that short list starts with the Radium Engineering Fuel Feed Line Kit WRX 15-2020, a model-specific kit rather than a universal length of hose you cut and hope fits.
A fuel feed line has one job: deliver fuel from the tank side of the system to the engine at a steady rate and pressure, without leaking, kinking, or chafing. Old rubber sections can harden and crack with heat cycles and age, and any restriction or leak in the feed side becomes a fueling problem the rest of the system cannot tune around. A braided replacement adds a protective outer layer and is the natural companion upgrade when the rest of the fuel system is refreshed.
When you shop this category, confirm the kit is listed for your exact year and model, and check whether it covers the feed side, return side, or both. Browse the wider Fuel Systems range alongside lines and hoses, and always check your year and model before ordering.
Brands to know
Radium Engineering built its reputation on precisely machined fuel-system hardware: surge tanks, fuel rails, pressure regulators, and vehicle-specific line kits like the WRX feed line in this collection. The brand is known for application-specific engineering rather than universal parts, which is what you want when a line must route through a crowded engine bay without rubbing.
DeatschWerks is a fueling specialist best known for fuel injectors and in-tank pumps for sport compact platforms, including Subaru applications. Its parts are natural partners for a feed line upgrade, because a fresh line only helps if the pump and injectors are sized as a system.
Fuel Injector Clinic focuses on high-performance fuel injectors and is known for supplying matched injector data that tuners rely on when they scale fueling for more power. If your build is outgrowing the stock injectors, its catalog is where the conversation usually starts.
Supporting pieces live in Fuel Pressure Regulators, where brands such as Aeromotive offer the regulation side of the system. For the bigger picture on planning a Subaru build in stages, read our guide to Subaru engine modifications.
FAQ
Do I need a tune after replacing a fuel feed line?
A like-for-like feed line replacement on an otherwise stock car generally does not change fueling, but any change to pumps, injectors, or pressure should be tuned for. When in doubt, ask your tuner before driving the car hard.
How hard is a fuel feed line kit to install?
A vehicle-specific kit is a moderate job involving depressurizing the fuel system. If you are not comfortable working with fuel, have a shop install it and check for leaks first.
Will this kit fit my WRX?
The kit sampled here is listed for the WRX 2015-2020. Fitment changes between generations, so check your year and model against the product listing before ordering.
Should I replace anything else at the same time?
Inspect the fuel filter, pump, and nearby hoses while the system is open, and replace any worn sealing hardware.
