Best Fuel Pumps for the WRX and WRX STI: 5 Top Picks Compared

The right fuel pump for a WRX or WRX STI depends on generation and fuel: the Walbro 255 kit ($109) is the classic 2002–2007 replacement, DeatschWerks' DW65c ($159) serves the 2015–2021 WRX, the DW300c ($189) and COBB's high-flow pump ($190) cover the 2008–2014 WRX and 2008–2021 STI, and DeatschWerks' brushless DW440 ($529) is the high-output option. Every pump below was verified live in our catalog today — and a pump upgrade only makes sense sized against the injectors it feeds, which our fuel injectors guide covers.

Supply Before Delivery

Injectors cannot deliver fuel the pump cannot supply, and the pump cannot supply fuel it cannot pick up — which is why serious builds pair a pump with a proper hanger or surge solution rather than dropping the biggest pump into a stock basket. Ethanol blends need substantially more volume than petrol for the same power, so E85 plans move you up this list faster than petrol plans do. Match the pump to the injector size and the fuel, and let your tuner confirm the pairing before you order either side of it.

1. Walbro 255LPH Fuel Pump + Kit, 2002–2007 — $109

Walbro [02-07 WRX, 04-07 STI] 255LPH Fuel Pump + Kit — $109. The GD-era default for two decades: a 255-litre-per-hour pump with its install kit, at the lowest price in this guide. For a stock or mildly tuned GD, this is the proven, unglamorous answer.

2. DeatschWerks DW65c, 2015–2021 WRX — $159

DeatschWerks [15-21 WRX, 13-16 BRZ/FR-S] DW65c Fuel Pump w/ Install Kit — $159. The VA WRX's in-tank upgrade: DeatschWerks' compact 65c-format pump with install kit, listed for the 2015–2021 WRX (and the first-generation BRZ/FR-S). On the direct-injected FA20, remember the in-tank pump feeds the high-pressure pump — it is the supply side of the system, not the whole story.

3. DeatschWerks DW300c, 2008–2014 WRX / 2008–2019 STI — $189

DeatschWerks DW300c Fuel Pump w/ Install Kit WRX 2008-2014 / STI 2008-2019 — $189. The GR/GV and VA-STI workhorse: a 300-series compact pump with install kit, sized for the injector upgrades most EJ builds actually run. This is the pump class our injector guide's ID1050x kits are built around.

4. COBB High Flow Fuel Pump, E85 Compatible — $190

Cobb Tuning [08-14 WRX, 08-21 WRX STI] High Flow E85 Compatible Fuel Pump — $190. COBB's entry at the same money as the DW300c, explicitly listed as E85 compatible and covering the STI to 2021. Between picks three and four, choose on your tuner's preference and the rest of your fuel system's brand loyalties — the capability class is the same.

5. DeatschWerks DW440 Brushless, 2008–2014 WRX — $529

DeatschWerks [08-14 WRX] DW440 440lph Brushless Fuel Pump Single / Dual Controller w/ Install Kit — $529. The step-change pick: a 440-litre-per-hour brushless pump with its controller, for builds whose injector and turbo choices have outgrown the 300-class pumps. Brushless control is the modern answer to big flow without big-pump heat and noise compromises — at a modern price.

When the Hanger Matters More Than the Pump

High-grip cars on track can starve a strong pump at low fuel levels, because the stock basket cannot keep the pickup covered. That is the problem hangers and surge systems solve — Radium's hangers for these cars start where these pumps leave off — and it is a fuel-level and cornering problem, not a pump-size problem. Diagnose which one you have before spending on either.