BM Catalysts recommends that new pressure pipes are fitted with a replacement DPF on all occassions. However, we also recognise that in some cases there is a need for DPF pressure pipes without requiring the DPF itself which is why our range of high-quality pressure pipes was developed. 

BM Catalysts offer a wide range of fitting kits for its products, including 87% coverage of its range of catalytic converters, 98% of its DPFs, 88% of its front pipes, and 99% of its Top 100 parts.

BM Catalysts offer a wide range of diesel particulate filters (DPFs). Alongside our standard range, we also offer premium products in the form of silicon carbide (SiC) DPFs which benefit from a 3-year warranty against manufacturing defects.

BM Catalyst introduce a brand new product to the range, a GPF.

A Gasoline Particulate Filter (GPF), sometimes referred to as a PPF (petrol particulate filter) or OPF (otto particulate filter), is an emissions control device designed to reduce particulate (or soot) emissions from gasoline direct injection (GDI) engines.

Much like a diesel particulate filter (DPF), GPFs have a wall-flow honeycomb structure and are comprised from the same ceramic cordierite material as many DPFs. They are specifically designed to filter the finer particulates found in petrol exhaust gases and retain them within the walls of the filter.

GPFs can withstand high temperatures and are extremely resistant to thermal shock. This is important given that petrol engines heat up and cool down much quicker than diesel engines.

WHY WERE GPFs INTRODUCED?

The drive to reduce carbon dioxide (CO₂) emissions from vehicles has resulted in the replacement of traditional port fuel injection (PFI) petrol engines with GDI engines. Since around 2017, sales of passenger vehicles equipped with GDI engines in many markets have exceeded sales of both PFI and diesel vehicles.

HOW DO THEY WORK?

As exhaust gases pass through a GPF, they are forced through the channel walls of the honeycomb structure. The trapped particulates are reduced to carbon dioxide while at the same time the unwanted hydrocarbons, nitrogen oxides and carbon monoxide are converted to small amounts of carbon dioxide, nitrogen, and water. GPF technology has matured in much the same way as DPF technology.

Many early GPFs were uncoated and positioned downstream of a three-way catalyst. Since around 2018, coated GPFs, which are sometimes referred to as four-way catalysts, are commonly located much closer to the engine.

GPFs require heat to perform effectively. Exhaust temperatures of petrol vehicles are relatively higher than that of diesels which means the higher temperatures allow trapped particulates to be carbonised. In some instances, a vehicle’s ECU may alter timings to trigger ‘learn burn’ conditions, whereby the amount of oxygen flowing through the engine and the exhaust system is increased. This also serves to increase operating temperatures, therefore allowing accumulated soot to be burned off.

BM Catalysts front pipes are made from high-quality materials, with our range manufactured to fit most leading makes of vehicles.