You cab buy them of ebay, but yes this is fabricated. They arn't that exspensive, if you don't find it on co.uk try .de. They are the same as bmw and so on, airfilters are chep as well on ebay. Paid 70 euros for customs, postage, adapter, powerpipe and airfilter. Have replaced arifilter because I forgot to oil it but it sounded great and went like hell ;D