Stainless Steel Manifold

MIJ Performance 4-into-1 and 4-2-1 exhaust headers are proven to out perform all standard (OEM) manifold systems on the market. Extensive research and development goes into each system to ensure the best performance route for your vehicle.

All our performance manifolds are precision bent on our bending machine. The flanges are laser-cut to the precise requirement and machine ground to the mating surface to ensure a leak-free seal then precision TIG welded together to form the ultimate stainless steel performance header. Our meticulously engineered manufacturing process ensures superior quality and a perfect fit with every manifold built. All MIJ custom exhaust manifolds are built using T304 stainless steel, eliminating the chances of rust.


Catalytic Converters

We offer standard replacement catalytic converters for all vehicles, whether it is a single or twin catalyst setup. We also specialise in hi-flow sports cats for the ultimate aftermarket upgrade. All catalysts are manufactured using the highest quality material including high-grade T316 welding.

Standard Catalysts: All our standard replacement catalytic converters are fitted in conjunction with your existing exhaust system. Our replacement catalyst will replace the old catalyst on your vehicle, and ensure that your vehicle's emissions are compliant with UK regulations.

Hi-Flow Sports Catalysts: MIJ hi-flow sports cats are 100-200 cpsi as apposed to 400-600 cpsi which a standard (OEM) Cat consists of. Standard (OEM) catalytic converters are restrictive in their flow. The typical flow rate of a standard catalytic converter is around 55-65% whereas our hi-flow sports cats have a flow rate of 75-85%, thus reducing back pressure substantially and increasing performance, especially on turbocharged engines. Emission levels are maintained at legal limits by careful selection of the volume of the metallic substrate.  However, they are designed to work specifically in conjunction with other MIJ Performance products and should not be used on their own (with an OEM exhaust system) or with other manufacturers' exhaust systems. We do not guarantee full performance potential when fitted with an alternative to our exhaust system.


De-Cat Replacement

Our custom built de-cat pipe is built as a direct replacement for the original catalytic converter. It is compatible with either your original exhaust system or one of our performance exhaust systems. Our custom built de-cat pipe is manufactured using T304 stainless steel pipework.  It comes with a lifetime guarantee and is an invaluable addition for the performance enthusiast.



Catalytic Back Exhaust System

MIJ Performance custom build any cat-back system to your specific requirements. Our custom built catalytic back (middle & backsection) exhaust system comprises of high-grade TIG welded pipework, the resonator (middle box) and the rear muffler (back box). All the relevant sections are co-ordinated together to develop a meticulously engineered exhaust system to precisely fit your vehicle. For the finishing touch we offer a wide range of tailpipe styles for you to choose from.



We offer standard replacement downpipes custom built to match and suit your vehicle. We also specialise in building specific custom downpipes for special project work. This is where your specific requirements and those of your vehicle are met. All MIJ downpipes are manufactured using T304 stainless steel, eliminating the chances of rust.



Exhaust Tags

Alfa Romeo Exhaut, Aston Martin Exhaust, Audi Exhaust, Bentley Exhaust, BMW Exhaust, Cadillac Exhaust, Chrysler Exhaust, Citroen Exhaust, Daewoo Exhaust, Dodge Exhaust, Ferrari Exhaust, Fiat Exhaust, Ford Exhaust, Honda Exhaust, Hyundai Exhaust, Jaguar Exhaust, Jeep Exhaust, Kia Exhaust, Land Rover Exhaust, Lexus Exhaust, Lotus Exhaust, Maserati Exhaust, Mazda Exhaust, Mercedes-Benz Exhaust, MG Exhaust, Mini Exhaust, Mitsubishi Exhaust, Nissan Exhaust, Opel Exhaust, Peugeot Exhaust, Porsche Exhaust, Renault Exhaust, Saab Exhaust, Seat Exhaust, Skoda Exhaust, Subaru Exhaust, Suzuki Exhaust, Toyota Exhaust, TVR Exhaust, Vauxhall Exhaust, Volks Wagon Exhaust, Volvo Exhaust

Helpful Links

Tail Pipes Range

We have the largest selection of SINGLE Exit and Twin Exit exhaust tail pipes in the UK for all makes and models.

ECU Remap & Tuning

We have the specialties to REMAP and fine TUNE your car  Read more...

Service & Repair

We offer a full car servicing & repair facility for our customers, MOT Failures & general repair work is carried out on-site by our qualified technicians. Read more... 

Exhaust System Construction

The 5 step approach to constructing a T304 MIJ stainless steel exhaust system Read more...

Exhaust Information

MIJ Performance 4-into-1 and 4-2-1 exhaust headers are proven to out perform all standard (OEM) manifold systems on the market. Read More...

Exhaust Vehicle Listing

View our full list of Makes and Models exhaust systems Read more...

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