The FitBest Air Filter 17211-899-000 + Spark Plug kit is meticulously engineered for superior generator maintenance, ensuring reliability when you need power the most. Compatible with a broad range of Generac GP Series models (GP5500, GP6500, GP7500, GP8000E, RS5500) as well as Honda GX240, GX270, and GX390 engines, this replacement set offers a true OEM-grade fit—eliminating guesswork and reducing generator downtime.
Performance, protection, and long service life—these are the hallmarks of the FitBest kit. The premium air filter efficiently captures airborne particles and debris before they reach your engine, protecting sensitive components from premature wear and helping sustain optimal airflow. The result: smooth operation, reliable starts, and maximized generator output even under demanding conditions.
Comprehensive maintenance, simplified. This kit includes not just the filter, but also a robust spark plug, letting you restore optimal combustion and fuel economy with one purchase. Whether you're preparing your generator for seasonal storms, worksite demands, or everyday reliability, the FitBest kit offers proven performance and peace of mind.
Installation is quick and straightforward, with each component designed for a direct fit—no modifications, no frustration. Backed by FitBest's reputation for durable, high-quality replacement parts, our kit meets or exceeds original equipment manufacturer specifications for long-term dependability.
Who is this for? Homeowners, professional contractors, and facilities managers seeking reliable generator maintenance solutions that combine ease, affordability, and lasting quality. If you use your Generac or Honda-powered generator for backup power, jobsites, or recreational activities, regular maintenance with FitBest kits ensures your equipment is always ready—when it matters most.
Compatible with Honda GX Series Engines – Engineered to fit a wide range of Honda GX240, GX270, GX340, and GX390 small engine models, including popular variants like GX240K1, GX240U1, GX270R, GX270U, GX340K1, GX340U1, GX390K1, GX390U1, GX390R1, and GX390UT1. Covers multiple engine types and VIN ranges for reliable fit and performance.
Extensive Model Coverage – Supports dozens of Honda engine subtypes and configurations across residential, commercial, and industrial applications. Ideal for generators, pressure washers, and other equipment using GX-series engines. VIN-specific compatibility ensures precision fit for models with types like ED2, VMT2, VPE5, VXG2, VC2N, and more.