Fuelab 85831-6 858 Series Long In-Line Fuel Filter with Integrated Check Valve 6 Micron Green

The Fuelab 85831-6 is a high-flow inline fuel filter from the 858 Series, featuring a long-length design with an integrated check valve and a 5-inch, 6-micron micro-fiberglass filter element. This all-in-one unit is engineered to maintain fuel pressure after engine and pump shutdown, eliminating the need for a separate check valve component and the extra fittings that come with it.

The integrated check valve helps prevent vapor buildup in the fuel rails during engine cooldown, protecting fuel system integrity between heat cycles. Because the check valve is housed inside the filter assembly, it benefits from the same filtration protection as the rest of the system.

Key Features:

• Long-length housing with 5-inch, 6-micron micro-fiberglass filter element for superior particle capture
• Integrated check valve maintains fuel pressure after engine and pump shutdown
• Compatible with gasoline, diesel, methanol, and ethanol fuels
• -8AN male inlet and outlet for direct connection to AN fuel system components
• Machined internal radii minimize pressure drop across the filter
• Billet aluminum housing with durable green anodized finish (military MIL-A-8625, Type II)
• Supports up to 200 gph flow capacity
• Rated to 200 PSIG maximum pressure
• Includes low-profile saddle clamp mounting bracket
• Replaceable filter element (disposable — do not clean)
• Backed by a limited lifetime warranty

The 858 Series is ideal for high-performance street, strip, and race fuel systems running any fuel type. The combined filter and check valve design simplifies installation and reduces potential leak points in the fuel circuit.