Why Choose Eminox? Eminox DPFs are manufactured in our world class production facility in Gainsborough, United Kingdom. The manufacturing site, opened in 2013, is both ISO and TS certified, ensuring the DPFs are created in line with high quality processes and within a minimum tolerance. We have used our knowledge and experience to manufacture a product that is comparable to the OEM product. Our DPFs are fully type approved (homologated), this means Eminox DPFs are independently certified to perform ‘as good as OE’ and comply fully with European Block Exemption Regulations, therefore can be used without invalidating the manufacturers warranty.