MOWFILL 2 Pack 78601 Air Filter With Pre Filter – Fits Generac 4000XL to GN4500

Enhance your Generac maintenance with a practical, ready-to-use replacement kit

The MOWFILL 78601 air filter set is designed to accompany a wide range of Generac units, including popular models like 4000XL, 3000XL, 3500XL, XP4000, XG4000, GN3800, and GN4500. This listing offers a two-pack of air filters paired with two pre-filters, all neatly packaged to ensure you have a ready supply on hand. Instead of sourcing individual parts, you get a complete replacement kit that supports quick swaps when you notice changing engine performance or airflow.

What you get and why it matters

• Two high-quality air filters
• Two compatible pre-filters
• Individually packaged items for easy storage and organization

All parts are designed with a factory-grade mindset, aligning with OEM standards to help maintain clean intake air. The separate packaging makes it simple to store spare elements until your next maintenance window.

Fit, size, and versatility

Designed to fit a footprint of 3 1/4 inches wide by 6 inches long and 1 inch tall, these filters offer a size-perfect replacement for many Generac applications. The kit supports a broad compatibility range, which makes it a practical option for households with multiple generators or for service professionals who encounter a variety of Generac units at jobsites.

Real-world use scenarios

• Seasonal generator maintenance when you’re prepping for peak power demand
• Emergency readiness by keeping spare filters on hand in a dedicated maintenance bin
• Simple at-home swaps that reduce downtime and keep engines breathing smoothly

Quality and maintenance mindset

While this kit mirrors OEM-style filtration, it doesn’t guarantee specific results. It offers a practical, ready-to-use replacement option that supports regular maintenance routines and orderly storage, helping you stay prepared for routine service intervals.