Precision Raceworks - In-Tank Fuel Filter & Regulator || E9x/E8x

Precision Raceworks E9x / E8x In-Tank Filter Regulator Assembly V2

The Ultimate Fuel System Upgrade for E-Chassis BMWs

🔧 Plug & Play Performance, Engineered for Flow

The Precision Raceworks In-Tank Filter Regulator Assembly (V2) is the evolution of our original fuel system solution, designed to eliminate the single largest restriction in the E9x/E8x low-pressure fuel system — the factory filter/regulator unit. Whether you're running low-grade pump gas or exotic race fuels, this fully modular solution delivers massive fuel flow increases, reduced electrical load, and plug-and-play installation.

💡 Key Features:

• +37% flow gain over OEM with a single pump @ 72psi

• +43% flow gain with dual pump setups

• Up to 99% more flow with engine-mounted regulator options

• Lower current draw = reduced strain on the EKP (factory fuel controller)

• Works with any fuel pump (OEM or aftermarket)

• Supports all fuels — pump gas, E85, and race blends

• Fully modular & upgradeable for future-proof builds

• Direct fit to OEM lines or upgraded AN lines

• Made in the USA 10-micron micro-glass filter included

⚙️ Options for Any Build:

Included Regulator (Standard Configuration):

• 5 BAR (72 PSI) 1:1 boost-referenced regulator

• Mounted in-tank for simple install

• Works with OEM or aftermarket lines

• Optional vacuum/boost reference — leave open if unused

Optional Regulator Upgrades:

• No Regulator — Use your own (includes AN-6 ORB port)

• Micro 5 Bar Static Regulator — Mounts directly to your port injection rail, includes return lines

• Adjustable 1:1 Regulator — Mounts to rotary HPFP, fully adjustable for boosted race applications

  Note: Adjustable regulators do not include check valves; may cause longer cranking after shutoff.

⚡ Electrical Efficiency:

Unlike stock components, the PRW V2 regulator is less restrictive, which means:

• Reduced fuel pump duty cycles

• Lower amp draw (up to 2.5A savings vs OEM under partial load)

• Improved fuel pump lifespan

• Lower risk of EKP module failure — a common weak point in E-chassis platforms

🛠️ Built to Last:

• 100% billet aluminum construction — no plastic components

• Oversized in-tank supply line

• Replaceable 10-micron fuel filter

• Compatible with OEM and aftermarket AN-6 ORB fittings

• Drop-in design with factory-style fittings for seamless installation

📈 Performance Gains Example:

• Walbro 450 + PRW V2 Regulator = More flow than dual 450s with OEM regulator

• Add engine bay-mounted regulator = Match or exceed triple 450 setups on OEM filter

📦 What’s Included:

• Billet In-Tank Filter/Regulator Housing

• 5 Bar 1:1 Boost-Referenced Regulator (or selected option)

• 10-Micron Micro-Glass Fuel Filter

• AN-compatible ports & OEM-style connections

• Modular return port (when applicable)

✅ Fitment:

• BMW E82 1 Series (128i, 135i, 135is)

• BMW E90 / E91 / E92 / E93 3 Series (323i, 325i, 328i, 330i, 335i, 335xi, 335is)

• BMW X1 (2012–2015)

• All N54 and N55 E-chassis fuel systems

📌 Pro Tips:

• For high-powered builds, pair with a Walbro 535 and optional engine bay regulator for the ultimate single-pump solution.

• If you're running dual pumps, the PRW V2 regulator helps extract maximum performance from your setup while easing the load on your EKP.

• Works seamlessly with Precision Raceworks low-pressure fuel pumps, port injection kits, and return systems.