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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.

  • 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.

    SKU: JAGFTYPEECUTUNE1221 Categories: , , , , , ,
  • Jaguar XJ and XJR 4.2 Catalytic Converters

    Jaguar XJ Catalytic Converters (Pair) – High Performance Jaguar XJ 4.2 Catalytic Converters

    4.2 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.

  • Jaguar 5.0 XJR Supercharger Pulley – Upgraded Supercharger Pulley XJ

    Jaguar 5.0 XJR Supercharger Pulley  – Upgraded Supercharger Pulley XJ 


    Jaguar XJ 5.0 modified Supercharger Pulley Dramatically improves throttle response and midrange power by up to 28bhp. Will bring your Jaguar xjr 5.0 to life. Paramount were the first to adopt and develop the new style of Jaguar jx 5.0 modified upper supercharger pulleys, unlike the lower expensive and cumbersome lower supercharger pulleys, the upper smaller pulley does not require an alternative pulley belt meaning the Paramount Jaguar XJ 5.0 supercharger pulley is low maintenance and less obviously changed from stock

    Jaguar 5.0 XJR Supercharger Pulley

    Jaguar 5.0 XJR Supercharger Pulley


    Not all Jaguar XJ 5.0 supercharger pulleys are equal, The Paramount Jaguar XJR supercharger pulley is high grade stainless steel, some cheap copies are manufactured from Ally and are not of the same quality – buy with confidence from Paramount.