Airaid · New
Airaid 18-19 Ford F-150 Synthamax Replacement Air Filter
MPN 851-385 · Store SKU air851-385
Supplier stock checked 11/7/2026, 7:24:37 AM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
This AIRAID Direct-Fit Replacement Filter is a drop-in replacement for your vehicle's stock paper air filter that is designed to improve horsepower and acceleration. The air filter is constructed with multiple layers of filter media and provides significant improvements in air flow and filtration compared to typical replacement filters with the added benefit of being washable and reusable. Why throw money away on a paper filter each time the old one gets dirty when you can upgrade to a serviceable AIRAID Direct-Fit Replacement Filter for often less than the cost of two stock replacements? Installation takes only minutes and is as simple as replacing your stock filter. This AIRAID Direct-Fit Replacement Filter is a drop-in replacement for your vehicle's stock paper air filter that is designed to improve horsepower and acceleration. FORD F150 OEM 2018-2019 SYNTHAMAX Replacement Air Filter
Manufacturer fitment & guides
Check 851-385 against the manufacturer’s application information below.
A manufacturer application guide is not available for this listing. Request the exact application from JuiceBuilt before payment.
Part-specific notes
- California Proposition 65: Y
