Precision Raceworks E9x / E8x High-Performance Bucketed Fuel Pumps

Modular Design | 100% E85 Compatible | Plug & Play Installation

🔥 Serious Fueling for Serious Builds

The Precision Raceworks Low Pressure Fuel Pump Kits for the E9x / E8x BMW chassis are engineered to meet the demands of high horsepower builds running all fuel types, including full E85. Designed around genuine Walbro fuel pumps, these kits deliver up to 350% more fuel flow than the factory unit, making them ideal for everything from mild street builds to fully built race cars.

Each stage is modular and upgradeable, allowing you to expand your fueling system as your power goals evolve — with no need to start from scratch.

💪 Pump Stages & Flow Ratings

Stage 2 (2.6 LPM)

• Pump: Single Walbro 450 (F90000274)

• Supports: Up to 575whp (500whp on full E85)

• Upgradeable: Yes — add Stage 3 or 3.5 modules

• Ideal for: Entry-level builds or flex-fuel conversions

Stage 2.5 v2 (3.9 LPM)

• Pump: Single Walbro 535 (F90000295)

• Supports: Up to 650whp (550whp on full E85)

• Upgradeable: Yes — ready for Stage 3/3.5 upgrades

• Ideal for: Higher boost street builds

Stage 3 (5.65 LPM)

• Pumps: Dual Walbro 450 (F90000274)

• Supports: Up to 1000whp (875whp on full E85)

• Includes: Hobbs switch + wiring harness

• Upgradeable: Yes — compatible with Stage 3.5 / Stage 4

• Best For: Aggressive builds and track cars

Stage 3.5 (6.4 LPM)

• Pumps: Walbro 450 + Walbro 525 (F90000285)

• Supports: Up to 1100whp (950whp on full E85)

• Includes: Hobbs switch + wiring harness

• Best For: Maximum flow without a 3rd pump or external controllers

Stage 3.75 v2 (7.3 LPM)

• Pumps: Walbro 535 + Walbro 525

• Supports: Up to 1150whp (975whp on full E85)

• Includes: Hobbs switch + wiring harness

• Ultimate flow with dual-pump reliability

Stage 4 – Hybrid Triple Pump (8.0+ LPM)

• Pumps: Dual Walbro 450s (in-bucket) + 1 Walbro 450 (external)

• Supports: Over 1300whp (1150whp on full E85)

• Includes: Hobbs switch + full wiring + bucketless hardware

• For: Full-race, max-output E85 builds

🛠 Use of the Precision Raceworks in-tank filter regulator is required to achieve full rated performance.

⚙️ Assembly Options

Kit Only

• Assemble yourself using your existing fuel bucket

• Detailed instructions provided

• Zero downtime — retain your original housing

• Great for DIY installers

New Build

• Fully assembled, plug-and-play solution

• 100% new parts, ready to drop in

• Ideal for shop installs or customers preferring no hands-on assembly

• Choose FWD or AWD configuration as needed

⚠️ Bucketed vs. Bucketless Note

While bucketless kits offer up to 0.2 GPM more flow, they are not recommended for:

• Road course racing

• Low fuel tank driving (below ¼ tank)

Retaining the OEM venturi system and fuel bucket ensures reliable fuel pickup under all conditions, including hard cornering and low fuel levels.

✅ Key Features

• True Plug-and-Play Installation

• Modular System – Upgrade Your Stage Later

• 100% E85 Compatible

• OEM-Quality Fitment and Reliability

• No Cutting, No Guesswork, No Core Charges

🚗 Vehicle Fitment

Compatible with the following BMW models:

• BMW 1M (2011)

• BMW 128i, 135i, 135is (2008–2013)

• BMW 323i, 325i, 325xi (2006–2011)

• BMW 328i, 328i xDrive, 328xi (2007–2013)

• BMW 330i, 330xi (2006)

• BMW 335i, 335i xDrive, 335xi, 335is (2007–2013)

• BMW X1 (2012–2015)

• Bfw4 (2022) — Please confirm compatibility; this may be a placeholder or typo.

Unleash your BMW’s true potential with a fueling system that grows with your build. Whether you're prepping for E85, boost, or big numbers, Precision Raceworks has the solution.