K & N AIR FILTER - RX-4040-1 BZ BLACK SLIDE       



K&N Xstream® Top Universal Air Filters Take Performance To The Next Level With The Addition Of A Filter Within The Filter's Top Adding More Filter Area For Higher Air Flow And A Longer Service Interval. The Xstream® Air Filter Provides Awesome Air Flow And Outstanding Filtration. When Racing, In Any Environment, Racers Need All The Protection And Airflow They Can Get. K&N Delivers.

All K&N Universal Air Filters Are Constructed With Ultra-Strong Molded Pliable Rubber Flanges Which Absorb Vibration And Allow For Secure Attachment And Can Also Be Stretched For Up To 1/16 Inch (1.5mm) To Fit In-Between Sizes.

K&N Universal Air Filters Are Washable And Reusable.

Part RX-4040-1 Product Specifications

  • Product Style: Round Straight Universal Air Filter
  • Flange Inside Diameter: 2.438 In (62 Mm)
  • Flange Length: 0.75 In (19 Mm)
  • Flange Type: Centered
  • Height: 4.75 In (121 Mm)
  • Outside Diameter: 4 In (102 Mm)
  • Top Style: X-Stream
  • Top Material/Finish: None
  • Filter Material: Cotton Gauze
  • Flanges: 1
  • Base Outside Diameter: 4 In (102 Mm)
  • Filter Re-Oiling Amount: 0.62 Oz (18 Ml)
  • Footnote 1: Refer To Custom End Cap/Xstream Clamp-On Sec
  • Footnote 2: Filter Has Molded-In Velocity Stackweight: 0.81 Lb (0.37 Kg)
  • Product Box Length: 4.63 In (117 Mm)
  • Product Box Width: 4.63 In (117 Mm)
  • Product Box Height: 7.25 In (184 Mm)


All prices shown exclude UK Value Added Tax (VAT), and postage. This will be calculated according to quantity and weight of items purchased, and shipping destination, on the CHECKOUT page.

You will be able to Check/Cancel or amend your order on the CHECKOUT page, before confirming it.

Various payment options are available including:

Secure on-line Credit/Debit card, Paypal, Cheque (drawn on UK Bank), Money or Postal Order. You can also telephone us with your Credit Card details if preferred.

Please note, there may be occasions where we need to request further postage payment.

PartPrice (GBP)Price (Inc VAT)Qty
K & N AIR FILTER - RX-4040-1 BZ BLACK SLIDE£106.95£128.34
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