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K&N 33-5040 Air Filter

Replacement Filters > Replacement Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   5.0 out of 5 stars   9 Customer Reviews
  • Designed to boost horsepower and rate of acceleration
  • Can be cleaned and used again
  • High air flow with exceptional filtration
  • Lasts up to 50,000 miles before cleaning is required depending on driving conditions
  • Works with original equipment manufacturer vehicle electronics
  • Emissions legal in all 50 US states
  • Will NOT void vehicle warranty
  • Million Mile Limited Warranty®
K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for the majority of vehicles on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N. See applicable instruction sheet for details. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty and will be the last air filter your vehicle will ever need.

[More Information on K&N Replacement Air Filters]

Product Specifications

Air Filter ShapePanel
Filter MaterialCotton Gauze
Filter Re-Oiling Amount1.05 oz (31 ml)
Height1.125 in (29 mm)
Outside Length13.563 in (344 mm)
Outside Width5.625 in (143 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height13.56 in (345 mm)
Product Box Length7.72 in (196 mm)
Product Box Width1.75 in (44 mm)
Product StylePanel Air Filter
Weight1.1 lb (0.5 kg)

K&N 33-5040 Air Filter Product Reviews

Wednesday, September 28, 2016 - Part 33-5040
Great usability, the filters clean easily, perfect fitment, and quality filtertration as well as pre-oiled, so that's nice.

David Townsend
Glendale, Arizona
Tuesday, September 13, 2016 - Part 33-5040
Excellent company, great price, and first to have this K&N filter for the Mark4 MX-5.

Ed Keating
Wimblington, United Kingdom
Tuesday, September 13, 2016 - Part 33-5040
Fast shipping and perfect fit.

Dale Sivia
Port Saint Lucie, Florida
Monday, August 8, 2016 - Part 33-5040
Great service! Fast shipping. All my vehicles have always had K&N filters. Wouldn't try any other filter. You have a customer for life.

Anthony Medrano
El Paso, Texas
Monday, August 1, 2016 - Part 33-5040
Excellent product, it's just what my 2016 Mazda MX-5 GT needed. All MX-5 ND owners should replace the stock filter with a 33-5040.

Jon Casselman
Barrie, Canada
Monday, August 1, 2016 - Part 33-5040
Bought for my husband as a gift for his new car. He says since he put it in, it makes the car feel zippy.

Shawna Langley
Citrus Heights, California
Tuesday, July 19, 2016 - Part 33-5040
Excellent quality and fit.

William Soto
Long Branch, Maryland