Thomas ProTough 400 Air Filter

Thomas ProTough 400 Air Filter
  • Designed to increase horsepower & torque for the Thomas ProTough 400 with the engine.
  • Washable & Reusable
  • This K&N ProTough 400 air filter lasts the lifetime of your vehicle.
  • Million Mile Limited Warranty with use on Street Vehicles
A K&N replacement Thomas ProTough 400 air filter is designed to improve engine performance and provide excellent filtration for your Thomas’s engine.

Your Thomas ProTough 400 deserves a K&N! Select the Product Info button below to see everything the air filter fits.

Thomas ProTough 400 - All Models
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This filter was exactly what I expected and fit perfectly in the air intake of my Branson tractor.
William Lowrance, Hermiston, Oregon
Replacement Industrial Air Filter
K&N E-4961
  • High air flow with excellent filtration
  • Washable and reusable air filter
E-4961  Thomas ProTough 400 Replacement Industrial Air Filter
List Price: $68.89
Your Price: USD $43.99
In stock