Replacement foam filter for 690, 700 & 701 air filter upgrade

Pre-oiled foam filter

Spare pre-oiled TwinAir foam filter for R/G airbox of your KTM 690, Husqvarna 701 or GASGAS 700. Upgraded version third generation. Single bolt solution inspired by KTM 450 Rally Replica. Easier manipulation for quicker cleaning and replacement.

TwinAir part number: 158423X

You can also buy new filter at you local TwinAir dealer – ask for item no: 158423X from the TwinAir catalogue. They may not have it in stock, but they can order it for you. (please note Twin Air dealers do not have the upgrade set for R/G Airbox)

Upgraded Airbox – New shape of air filter

R/G Airbox has been upgraded for single bolt solution. With the new ordered air filter you will get also needed parts for easy upgrade your current R/G airbox. This consists of the updated inner cage and bolts.

If you are ordering spare filters for more motorbikes please let us know in the note, we’ll send you relevant number of upgrade sets.

Important: not all previous versions of airbox are upgradable. Altough the new air filter is sent automatically with the updated inner cage, is crucial to check your current airbox, whether is upgradable or not.

Determining are the inserted brass nuts in the airbox rim. If you have the version with these brass nuts, please let us know and we will assist with the latest airbox.

Note: please ignore the naming v1, v2, v-whatever, as we’ve never officially had such labeling and no one actually knows what is meant by any particular version name :)

Preview of replacement foam filter for 690, 700 & 701 air filter upgrade

What is included in the package?

  • TwinAir pre-oiled foam filter
  • TwinAir catalogue no: 158423X
  • with a new order you’ll get updated airbox cage and bolt


How to order the replacement foam filter

  • Clicking the order button
  • Fill in your delivery address and production year of your bike
  • You will be forwarded to PayPal gateway where you can pay via PayPal or with your credit card
  • We ship usually within two working days
  • We ship all over the world with tracking number

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