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  • Jaguar XJ 4.0 Exhaust System / Jaguar XJ Exhaust Mufflers 1998 – 2003

    Jaguar XJ 4.0 Exhaust System / Jaguar XJR Exhaust Mufflers 4.0

    High grade stainless steel Jaguar XJ exhaust system exhaust and Jaguar XJ mufflers made to order. Paramount offer an unrivalled range of Jaguar XJR and XJ tuning parts, Jaguar exhaust systems and exhaust mufflers for the complete range of Jaguar cars, including the Jaguar XJR and XJ exhaust system.   

    The Jaguar XJ exhaust system sound, look, finish can all be custom tailored for the desired result, all of our Jaguar XJ exhaust systems come with a life time corrosion warranty too 

    Performance and stainless steel Jaguar XJ exhaust systems and Jaguar XJ mufflers are available for all Jaguar cars and models if you are not sure, or if you don’t see what you are looking for please e-mail us – we are here to help. 

    Paramount the home of the custom performance Jaguar XJexhaust system, Jaguar XJ exhaust mufflers and Jaguar XJR tuning parts   




  • Jaguar XJ 4.2 Remapping & Tuning

    Jaguar XJ 4.2 Tuning and Jaguar XJR 4.2 Remap Tuning

    Jaguar XJ Tuning and Jaguar XJR Remapping can be carried out by Paramount Performance at many locations across the UK and around the world.

    Our Jaguar XJ tuning and Jaguar XJR remapping is completely custom, with each XJ remap being written live to your vehicle, the Jaguar XJ tuning can take account of your XJ’s modifications, i.e. Paramount Jaguar XJ performance exhaust systems, or sports catalytic convertors as well as your driving requirements and fuel grade.

    Paramount operate the very latest range of car tuning and remap software and our dedicated team of car tuning engineers have years of experience working in the prestige and Ferrari car tuning arena.

    Jaguar XJ tuning and Jaguar XJR ECU remapping gives a power increases of around 25bhp (depending on precise model) with significantly better throttle response, full custom chip tuning and live rolling road testing and tuning for your Jaguar XJ are available at many locations – please ask for details.

    Paramount Performance is the home for all your Jaguar tuning and performance parts

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  • Jaguar XKR / XJR 4.2 Catalytic Converters 200 cell

    Jaguar XKR 4.2 Catalytic Converters (Pair) Upgraded Performance Jaguar XK and XJR Catalytic Converters  


    Standard Jaguar catalytic converters have 600 cells per square inch, these original standard cats can be very restrictive in their gas flow. Paramount have developed exclusive 200 cell Jaguar XKR 4.2 Catalytic Converters .


    These Jaguar XKR 4.2 Catalytic Converters  and aand racing cats are integrated into a large bore downpipe, they reduce back pressure substantially and increase flow rates, they are particularly effective on Jaguar Supercharged engines, and when combined with other Paramount Performance parts can push the Jaguar 4.2 XKR past 500bhp.


    Jaguar XKR 4.2 Catalytic Converters  Performance Hi-flow Sports Cats work exceptionally well on re-mapped (chip tuned) engines. Power increase 22-25 bhp in the midrange.

    *For off-road & Motorsport use only


  • Jaguar Exhaust Tuning – Burble Activation

    Jaguar Exhaust Tuning – Burble Activation

    What your Jaguar XJR or Jaguar XF to sound more like a Jaguar F Type with burbles and overrun popping?

    Paramount can tune your software to the exact same level as Jaguar use on the original F type exhaust software, burble activation and growl on overrun and between gear changes

    Paramounts Jaguar exhaust tuning software can be combined with additional changes such as performance tuning, speed limiter de-activation, etc.

    Have your Jaguar set up and tuned the way you want it, not the way it comes.

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