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  • Jaguar XJ 3.6 Exhaust System & Mufflers

    High-grade stainless steel Jaguar XJ 3.6 exhaust system and Jaguar XJ 3.6 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, the finish can all be custom tailored for the desired result, all of our Jaguar XJ exhaust systems come with a lifetime corrosion warranty too!

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  • Jaguar XJ 5.0 Tuning – Home tuning and mail order tuning system

    Jaguar XJ 5.0 Tuning – Home tuning and mail order tuning system

    Paramount Performance already have an amazing range of Jaguar XJR 5.0 tuning and ecu remapping, but we appreciate depending on where you are you may not be able to get to us or one of our dealers

    And so now we can tune your vehicle where ever you are! – our brand new driver operated Jaguar tuning system enables you to plug in where ever you are in the world and upload a custom and bespoke Jaguar XJR 5.0 tuning file direct to your car..

    The Jaguar XJR 5.0 tuning is very effective offering up to 50bhp on the supercharged versions, and huge pulling power.

    Throttle response and midrange power is dramatically improved – its not subtle and is suitable for the Jaguar XJ and XJR models. Jaguar XJR 5.0 mail order tuning with worldwide shipping is now a reality, and we can adjust your Jaguar XJR 5.0 tuning for modifications, like our Jaguar 5.0 super charger pulley, 200 cells cats, or Jaguar XJR exhaust system, and also your fuel grade or location too.

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  • Jaguar XJ V12 Exhaust Manifold Headers long

    Jaguar XJ V12 Exhaust Manifold and Jaguar XJ V12 Exhaust Headers – long performance headers   

    High graded stainless steel Jaguar XJ V12 headers and manifolds, performance long tail manifolds – hand made to order in the UK 

    Paramounts Jaguar XJ V12 exhaust manifolds and headers have a life time corrosion warranty.  

    Paramount the home of the classic Jaguar XJ V12 performance exhaust manifolds and headers, mail order with worldwide shipping and tax free to many locations. Uk fitting service and Jaguar V12 restoration service available 

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  • Jaguar XJ and XJR 4.0 200 catalytic Converters (Pair)


    Jaguar XJ Catalytic Converters (Pair) – High Performance Jaguar XJ 4.0 Catalytic Converters

    4.0 Jaguar XJ Catalytic Converters – High Performance 200 cell catalytic converters  

    The standard Jaguar xj and xjr catalytic converters have 600 cells per square inch, these original standard cats can be very restrictive in their gas flow.

    Paramount’s high flow  Jaguar  XJ Catalytic Converters have 200 cells per inch, these Jaguar XJ Catalytic Converters fit both  the Jaguar XJ and XJR. These Jaguar XK Catalytic Converters are integrated into a large bore downpipe, they reduce back pressure substantially and increase flow rates, they are particularly effective on Jaguar Supercharged engines. 

    Emission levels remain fully road and MOT legal. Performance Hi-flow Jaguar Catalytic Converters and Sports Cats work exceptionally well on re-mapped (chip tuned) engines. The power increase delivered by our Jaguar XJ Catalytic Converters is around 22-25 bhp across the midrange.

    Paramount Performance home for your Jaguar Catalytic Converters and all your Jaguar tuning needs  

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