Technical Guides

Check out our comprehensive technical guides, which address many of the engineering aspects of emissions components. Exhausts, catalytic converters and diesel particulate filters are explored by highly qualified Klarius technicians – as well as common failure modes and general advice.

Have a topic you’d like us to cover? Get in touch.

View videos, read case studies and engage with the technology that is currently shaping modern day emissions systems below:

Klarius employs highly trained engineers who are experts in automotive emission control technology. An integrated production methodology that encompasses design, manufacturing and testing in one facility ensures a huge company knowledge base. Through our experiences delivering market leading components to customers and distributors, we try to tackle preconceptions on emissions components so you can have an efficient, environmentally friendly and reliable product to sell or use.

Our great experience working with garages and technicians means we are well informed on technical issues, which influences our product range. With our commitment to producing aftermarket parts for both the latest models and classics, our engineers utilise an inherent knowledge of vehicles to offer advice and guidance to our users.

We even offer training for approved garages via our IMI accredited Emissions Training initiative, which offers qualifications for knowledge on emissions components, failure modes and governing legislation. To learn more, visit


Good quality replacement DPF

A DPF is essentially a ceramic or metallic filter that collects soot from exhaust gases, what many people don’t realise is that it is also a service component. Over time DPFs will fill-up with soot and other particulates from combustion and will periodically go through a regeneration (cleaning) cycle where the soot – which is mainly carbon, is burned off. This process creates a small amount of ash each time it happens, which will eventually block the DPF and it will require replacing.


Differences between CATs and DPFs

There are some similarities between a standard CAT and a DPF, they both use a ceramic or metallic element that exhaust gases pass through, the major difference is that a DPF is essentially a filter that collects soot and is a service component. A catalyst changes the chemical composition of the exhaust gas rather than filtering it, the exhaust gas passes through the CAT and a reaction takes place on the surface of the ceramic block or monolith which is coated with a mixture of platinum, palladium or rhodium.