BMW S65 & S85 Engine Fuel Filter Kit

One of the most overlooked yet critical components of your fuel system is post-pump filtration—and in the E6X M5/M6 and E9X M3, it was completely omitted from the factory. These cars rely on a single pre-pump filter, a cellulose paper element with an unknown micron rating, never designed for ethanol-based fuels. With today’s fuel quality, especially in areas with E10 gas, this lack of filtration has led to a growing number of stuck injector failures—which can wash away the oil film, damage cylinder walls, and cause catastrophic engine failure.

Our Solution

This USA-made inline fuel filter kit is designed to provide proper post-pump filtration, protecting your injectors and engine from contaminants that the factory pre-pump filter simply cannot handle. Inspired by proven solutions in the domestic car industry—such as the 2009-2013 Corvette ZR1—this kit ensures clean fuel reaches your injectors, improving long-term reliability.

Version 2

Our newly redesigned inline fuel filter kit is built with performance and precision in mind. We’ve now added a sensor-post housing—relocating the low-pressure sensor after the filter. This means your ECU reads true pressure at all times, maintaining accurate fueling and engine performance even as the filter begins to do its job.

Unlike other kits on the market, ours retains all stock fuel lines, requires zero rerouting, and installs without forcing clearance compromises. The sleek housing was engineered to fit as if it came from the factory—tucking in perfectly under the hood.

Key Features:

✅ 10-Micron Filtration – Uses an easily accessible Earls filter element, widely available for quick replacement.

✅  Sensor Post Housing - Low-pressure sensor is now correctly placed after the filter, so your DME gets accurate fuel pressure readings

✅ OEM Fitment – Designed to work seamlessly with factory fuel lines, ensuring a secure fit and easy installation.

✅ Prevents Injector Sticking – Eliminates debris and contaminants that can cause stuck injectors and engine failure.

✅ Ethanol-Compatible – Unlike the factory filter, this system is designed to handle E10 and ethanol-blended fuels.

✅ Made in the USA – Precision-machined and manufactured to the highest standards for durability and performance.

✅ Easy DIY Installation – Designed for enthusiasts of all skill levels, with a plug-and-play setup.

Upgrade Right Away!

Many owners have experienced injector failures even after replacing the factory pre-pump filter. The stock system was never designed to ensure clean fuel reaches the injectors—only to protect the pump from large debris. This inline fuel filter kit is the missing piece to long-term fuel system reliability.

Protect your injectors. Protect your engine. Upgrade your fuel system today.