Live Chat
Visa, MasterCard, Maestro,, JCB, MasterPass, WorldPay, PayPal

K&N 38-2021R

Replacement Filters > Replacement Air Filter-HDT
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5
5.0 out of 5 stars 4 Customer Reviews

Not in stock.
Will ship as soon as it becomes available.
List Price: £352.43
Your Price: GBP £265.19 (VAT Included)
You Save 24.8%
Find a Local Dealer


K&N's line of Heavy Duty commercial grade air filters are washable and have been specially engineered for heavy duty trucks, RV's and agricultural equipment. They use a new hybrid filtration medium that's incredibly easy to clean. They can be washed using power sprayers, pressure washers or standard truck washing equipment and they do not require the use of oil. Instead of repeatedly throwing away expensive disposable air filters, now you have a choice. A washable air filter designed to improve engine performance will now make air filter maintenance a snap.
  • Washable and reusable
  • Easy to clean
  • Outstanding filtration
  • No oil required

Available Information

Part 38-2021R Product Specifications

Base Inside Diameter5.938 in (151 mm)
Base Outside Diameter13.063 in (332 mm)
Flow DirectionReverse
Filter MaterialNon-woven Synthetic
Height25.688 in (652 mm)
Inner WireYes
Top Inside Diameter7.563 in (192 mm)
Top MaterialNone
Top Outside Diameter12.813 in (325 mm)
Top StyleRubber
Warranty36 Months - 300,000 Miles
Product StyleHeavy Duty Replacement Filter Round Tapered
Air Filter ShapeRound Tapered
Package Contents1 Air Filter, 2 Gaskets
Package Quantity1
Weight18 lb (8.2 kg)
Air Filter Large End Diameter13.063 in (332 mm)
Product Box Height14.31 in (364 mm)
Product Box Length30.63 in (778 mm)
Product Box Width14.5 in (368 mm)
WARNING: Cancer and reproductive

Product Reviews

September 17, 2018 - Part 38-2021R
Well worth the money. Big improvement in air flow

Neal Dams
Hamilton, Michigan
December 9, 2017 - Part 38-2021R
Great product and perfect fit.

Michael Deer
Elgin, South Carolina
September 30, 2016 - Part 38-2021R
I purchased two different types of filters for two different types of trucks. Excellent product. I will buy again.

Bernardino Gomez Jr
Dansville, Michigan
See all reviews
Review part 38-2021R