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K&N E-3737 Air Filter

Replacement Filters > Round Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   5.0 out of 5 stars   3 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 ShapeRound
Filter MaterialCotton Gauze
Filter Re-Oiling Amount1.45 oz (43 ml)
Height3 in (76 mm)
Inner WireNo
Inside Diameter12.688 in (322 mm)
Outside Diameter14 in (356 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height4.38 in (111 mm)
Product Box Length14.13 in (359 mm)
Product Box Width14.13 in (359 mm)
Product StyleRound Air Filter
Top Material/FinishNone
Top StyleOpen
Weight2 lb (0.9 kg)

K&N E-3737 Air Filter Product Reviews

Monday, October 31, 2016 - Part E-3737
Excellent product. I use K&N filters in both my cars. The shipping was fast. I highly recommend your company to all my friends and family. Mark

Mark A. Daly
Brandon, Florida
Tuesday, June 14, 2016 - Part E-3737
Excellent product, made a massive difference on my Chevy V8 6.3Ltr Beck Racing Engine.

James Kirk
Britannia, Bacup, United Kingdom
Monday, December 22, 2014 - Part E-3737
Quality product. Perfect fit, as always.

Craig Nitta
Los Angeles, California