NEW EMISSION TECHNOLOGY
HJS EMISSION TECHNOLOGY LAUNCHES PREMIUM TX4 AFTERMARKET EXHAUST PARTS FOR THE UK MARKET
By HJS Emission Technology
sales-uk@hjs.com
www.hjs-emission.co.uk
HJS Emission Technology has officially launched its premium aftermarket exhaust range dedicated specifically to Euro 5 TX4 models, reinforcing its commitment to quality, compliance, and durability in the UK taxi sector.
Designed exclusively for the demands of urban taxi operation, the new range includes fully certified:
l Diesel Particulate Filters (DPF®) l Diesel Oxidation Catalysts (DOC) l Exhaust Silencers
HJS Emission Technology identified a clear gap in the UK aftermarket: the absence of quality Euro 5 replacement DPFs, DOCs and silencers for the TX4 platform. The shortfall became apparent during HJS’s work on its TX4 Euro 6 emission upgrade programme in London. Despite extensive research across the marketplace, no aftermarket or OE replacement products were found.
Drawing on decades of aftermarket manufacturing expertise, HJS took the strategic decision to engineer the solution in-house. The programme began at HJS UK, where initial prototypes were developed and subjected to comprehensive internal testing. Following
successful evaluation, the components were trans- ferred to the company’s headquarters in Germany for advanced prototyping and detailed flow analysis.
After rigorous durability and performance testing, the DPF, DOC and silencer assemblies were submitted for homologation, securing full approval and E-mark certification to meet UK regulatory requirements. Notably, the HJS DPF is manufactured using high- grade silicon carbide substrate technology - a material recognised for its superior thermal resistance, filtration efficiency and long-term reliability compared with lower-specification alternatives available in the marketplace.
The project also supports the continuation of HJS’s Euro 6 retrofit upgrades for TX4 taxis operating in London. Under strict requirements set by Transport for London (TfL), Euro 5 diesel taxis undergoing conversion must replace both the DOC and DPF to achieve compliance. Retrofitting provides a highly cost- effective pathway for drivers to meet Euro 6 emissions standards, extend vehicle lifespan and significantly reduce environmental impact - contributing to improved urban air quality across the capital.
With certified components, OEM-level quality and a focused commitment to the TX4 platform, HJS reinforces its position as a trusted exhaust and emissions partner for the UK taxi industry.
For further information on our aftermarket products or Euro 6 emission upgrades call us on 01344 566050.
30
MARCH 2026 PHTM
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