{"product_id":"k-n-custom-air-filter-e-3987","title":"K\u0026N Custom Air Filter E-3987 – Bespoke Induction Element","description":"\u003cp\u003eA custom-engineered K\u0026amp;N air filter element designed for bespoke induction systems and performance engine modifications. Washable cotton-gauze media provides sustained efficiency and extended service intervals.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCustom-specification cotton-gauze media tailored to non-standard induction architectures\u003c\/li\u003e\n\u003cli\u003eWashable and reusable construction – up to 100,000 miles service life between cleaning\u003c\/li\u003e\n\u003cli\u003eEngineered to reduce intake restriction in modified manifold and intercooler inlet configurations\u003c\/li\u003e\n\u003cli\u003eFitment verification required – confirm your intake geometry with FD Racing before order\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"K\u0026N","offers":[{"title":"Default Title","offer_id":56622042743164,"sku":"E-3987","price":62.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0550\/9208\/4867\/files\/E-3987.jpg?v=1775907903","url":"https:\/\/fdracing.co.uk\/products\/k-n-custom-air-filter-e-3987","provider":"FD Racing","version":"1.0","type":"link"}