Quick View Noise reduction Custom wishlist OKSXF 250/350/450 23/25 Noise reduction kitAll parts to convert your bike compatible with the new FIM 109 dB noise regulation.The kit contains:Special air box inserts which will be mounted in the airboxSpecial air filter supportPre oiled dual layer air filterAkrapovič "Slip-on Line" with special noise reduction insertSpecial motormapping required.€859.05