CATALYTIC CONVERTERS

At MIJ Exhaust, we specialise in high quality catalytic converter solutions, including standard replacements and high-flow sports catalytic converters.

Whether your catalytic converter has failed, been stolen, or you’re looking to upgrade performance, our team can provide a cost effective, tailored solution to suit your vehicle.

All systems are built and fitted using high-grade materials and expert fabrication, ensuring long-lasting performance and reliability.

 

What Does a Catalytic Converter Do?

A catalytic converter (CAT) is a key part of your exhaust system, designed to reduce harmful emissions produced by your engine.

It works by converting gases such as:

  • Carbon monoxide (CO)
  • Hydrocarbons (HC)
  • Nitrogen oxides (NOx)

into less harmful substances  – helping your vehicle remain road legal and MOT compliant in the UK.

 

Sports Catalytic Converters (High-Flow Cats)

We specialise in high-flow sports catalytic converters, offering a practical alternative to expensive dealership replacements.

Benefits of a Sports Cat:

✔️ Improved exhaust flow and reduced restriction
✔️ Enhanced engine performance and throttle response
✔️ More cost-effective than OEM catalytic converters
✔️ Designed to meet emissions standards (vehicle dependent)
✔️ Less attractive to thieves due to reduced precious metal content

Our in-house fabricated sports cats:

  • Use 200 cell high-flow cores
  • Are built using premium-grade materials and welding
  • Are tailored to your specific vehicle

Catalytic Converter Theft – A Growing Issue

Catalytic converter theft has risen significantly across the UK in recent years.

  • Thefts can happen in under 60 seconds
  • Vehicles, especially hybrids, are commonly targeted
  • Precious metals inside the CAT make them highly valuable

If your catalytic converter has been stolen:

  • Your vehicle will be significantly louder
  • It will fail its MOT emissions test
  • A replacement catalytic converter will be required

At MIJ Exhaust, we offer cost effective replacement solutions to get you back on the road without dealership-level pricing.

 

Catalytic Converter Position & Labour Differences

Not all catalytic converters are equally accessible — and this directly affects labour time and cost.

Common locations:

➡️ Close to the engine (off the manifold or turbo)

  • Harder to access
  • More labour intensive

➡️ Integrated into the downpipe

  • Common on modern vehicles
  • May include additional components

➡️ Underfloor (further down the system)

  • Easier to access
  • Faster installation

💡 Because of these variations, we always recommend inspecting the vehicle before providing a final quote.

 

Why Inspection Is Important

Catalytic converter work is rarely “one size fits all”.

During inspection, we assess:

  • Whether it’s a primary or secondary catalytic converter
  • The condition of surrounding components
  • Whether the system is integrated with other parts
  • The condition of fixings (nuts, bolts, flanges)
  • Whether sensors (O2/lambda) are intact

Due to heat and age:

  • Fixings can be corroded or seized
  • Removal may require specialist tools
  • In some cases, bolts may snap during removal

We always take care and keep you informed throughout the process.

 

Catalytic Converter Services at MIJ Exhaust

At our exhaust centre in Walsall, we offer:

✔️ Supply and fitment of catalytic converters
✔️ High-flow sports catalytic converter upgrades
✔️ Custom fabrication for all vehicle types
✔️ Integration with existing exhaust systems
✔️ Honest advice and tailored solutions

 

Get a Quote

If you need a catalytic converter replacement or upgrade:

👉 Call our team or fill out our online quote form for a personalised, no-obligation quote.

We’ll assess your vehicle and provide the most suitable solution based on performance, budget, and compliance.

 

Your catalytic converter plays a vital role in your vehicle’s performance and emissions.

Whether you’re dealing with a failure, theft, or looking to upgrade, choosing the right solution is key — and a proper assessment ensures you get the best result.

 

For more information, advise or a quote, you can simply fill out the quote form or feel free to call us on 01922 645646