What is the purpose of the check valve?

The check valve prevents fuel from draining back into the tank when the pump is not running. This helps maintain fuel pressure at the injectors for quicker starts and more consistent performance.

What maintenance is required for this fuel filter?

The filter element should be cleaned periodically to maintain optimal fuel flow. The interval depends on fuel quality and pump volume, but every 6 months is a good starting point. You can remove and backflush the element with solvent.

Can I use this filter with E85 fuel?

Yes, the stainless steel filter element is compatible with all fuel types, including gasoline, diesel, methanol, and E85.

Fuelab 858 In-Line Fuel Filter Long -8AN In/Out 100 Micron Stainless w/Check Valve - Purple

Specifications

Brand: Fuelab
Part #: 85821-4
UPC: 00845096005900

Fuelab 858 In-Line Fuel Filter Long -8AN In/Out 100 Micron Stainless w/Check Valve - Purple

Name: Fuelab 858 In-Line Fuel Filter Long -8AN In/Out 100 Micron Stainless w/Check Valve - Purple
Brand: Fuelab
SKU: fuelab-fuelab-858-in-line-fuel-filter-long-8an-in-out-100-micron-stainless-w-che-t14-309320
Price: 318.00 USD
Availability: BackOrder

$318.00

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

High-flow inline fuel filter with check valve. Keeps your fuel system clean.

Key Features

-8AN ports — high flow capacity
100-micron stainless element — compatible with all fuel types
Includes check valve — prevents fuel drain-back
Universal fitment — works on many applications

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

Secure CheckoutFast Shipping631-982-0042