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K&N Air Filters for the Thomas ProTough 400

Thomas ProTough 400 Replacement Air Filters

Buy now from K&N's Online Store and get a 100% money back guarantee on any air filter for Thomas models!
  • Designed to Increase Horsepower and Acceleration in your Thomas
  • High Air Flow with Excellent Filtration
  • Washable and Reusable
Order your K&N replacement air filter Factory Direct today!
Help your Thomas ProTough 400 run better.
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K&N Replacement Air Filters
Vehicle DescriptionPart NumberProduct Image 
Thomas ProTough 400 - All
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Thomas ProTough 400 Air Filter
E-4961 E-4961 THOMAS ProTough 400 Air Filter
List Price: $68.89
Factory Direct Price: $43.99

Upgrade your Thomas ProTough 400 today with a K&N air filter.