About KatDoc – Your expert for catalytic converters & diesel particulate filters
KatDoc is your reliable online shop for high-quality catalytic converters, diesel particulate filters (DPF) and exhaust system spare parts. Whether workshop, trade or private customer: here you will find the right converter or DPF for your vehicle quickly, easily and with guaranteed fit, matched to your car's emission standard, for example Euro 4, Euro 5 or Euro 6.
Catalytic converters & DPFs for all common car brands
Our range extends from common standard models to hard-to-find special parts. You will find catalytic converters, diesel particulate filters, flex pipes and parts for exhaust repair for many brands such as VW, Audi, BMW, Mercedes-Benz, Opel, Ford, Renault, Peugeot, Skoda and Toyota. Our parts finder lets you search by brand, model and emission standard.
Personal advice & free fit check
Do you have questions or are unsure which converter or particulate filter fits? Our support team will help you immediately to find the exact right part – by call, email or WhatsApp, ideally with a photo of your vehicle registration document or the OE number of your old part. Contact us now.
Tested new parts with a 2-year warranty
At KatDoc you receive exclusively tested new parts with perfect fit, a 2-year manufacturer's warranty and fast shipping. Our catalytic converters and diesel particulate filters come from well-known manufacturers such as AS, BM Catalysts, EEC and NTY. From catalytic converters to special parts: quality without compromise.
KatDoc stands for experience, expertise and a service that keeps its promises. See for yourself: we make finding a catalytic converter or diesel particulate filter simple, efficient and reliable.