How BM engineered a one-off CAT for a Car SOS classic

When the production team from Car SOS arrived at BM Cats, it marked the start of a truly special collaboration, one that combined engineering expertise with the excitement of working alongside a much-loved television production to form part of its 14th series.  

Over the course of several months, the project unfolded with careful planning, preparation and precision. Hosting the Car SOS crew brought a unique energy to BM Catalysts’ operating facilities. Cameras captured every stage of the process, but behind the scenes it was the same unwavering focus on quality, craftsmanship and execution that defines every project. 

At the heart of the episode was a classic 1990 Nissan Pulsar GTI-R in need of more than just a cosmetic restoration. The objective was to return the vehicle to full roadworthy condition, ensuring it could meet modern emissions standards while retaining its much loved and iconic baby Godzilla alias.  

However, a critical issue stood in the way. The car’s emissions control system was incomplete. From the outset, it was clear that this would not be a straightforward job. Essential components were missing or damaged, meaning the Pulsar couldn’t meet the compliance requirements in its current state.  

There was no off-the-shelf solution available. Instead, BM Catalysts utilised their specialist skills to create a bespoke system. One that would integrate seamlessly with the vehicle while delivering the necessary emissions performance and is now also available as part of the extensive product range.   

It was a complex challenge that required both technical innovation and a deep understanding of the vehicle’s dynamics. The main barrier faced during the initial phases of the project was the lack of an existing OE reference. Therefore, to overcome this, BM Catalysts sourced a replica vehicle. By carefully dismantling and analysing its exhaust system, the development team established the optimal fitment, ensuring maximum accuracy further down the line. 

To make matters more challenging, the ‘replica vehicle was also missing its catalytic converter. However, once the vehicle’s layout and engine characteristics were fully mapped, a one-off catalytic converter was designed specifically for the Car SOS Pulsar.  

Every detail mattered. This was not simply about making something fit, it was about creating a solution that performed flawlessly and stood the test of time and the finished product did just that.  

Once installed, it completed the Pulsar’s emissions system, bringing the car up to compliance and restoring its roadworthiness. The transformation was immediate and significant, enabling the vehicle to return to the road as intended.  

The completed project was later unveiled to owner and life-long petrol head, Raymond at Silverstone, the most iconic circuit in British Motorsport. The reveal itself was a fitting tribute, not just to the car, but to the journey behind it. Seeing the fully restored Pulsar take its place in such a legendary setting added an extra layer of emotion and significance to the moment. For Raymond, it wasn’t just about getting his car back, it was about reclaiming a piece of personal history, brought back to life in spectacular fashion.  

The episode itself highlighted something far greater than the technical challenge. At its core, Car SOS is about helping people, using a shared passion of cars as a vehicle for something deeply human, being part of a project that slivers such a meaningful outcome made it all the more important for the BM Catalysts team to get every detail right. This wasn’t just another engineering task, it was an opportunity to contribute to something genuinely positive, where the end result would have a lasting emotional impact.  

As a team made up of genuine car enthusiasts, BM Catalysts immediately connected with both the vehicle and Raymond’s story. Being ‘car people’ meant understanding exactly what was at stake, not just the mechanical challenger, but the sentimental value behind it. That shared passion created an even greater driver to deliver solution worthy of the car and its owner. There was a real sense of pride in knowing that the work carried out would play a part in such a meaningful transformation. 

Working alongside the Car SOS team was a genuine highlight for everyone involved at BM Catalysts. The project combined months of preparation with hands-on expertise as well as teamwork, and a shared goal, all culminating in a successful and highly rewarding result.  

More than anything, it showcased the craftsmanship and dedication that BM Catalysts brings to every challenge. Whether on camera or behind the scenes, the focus remains the same, delivering engineered emissions control solutions of the highest quality, driven by passion, precision and a genuine love for cars.  

Relive the Car SOS visit from BM Catalysts point of view here.