Powerhouse Jaguar XJ Sport / Sentinal 5.0 Supercharger Upper Pulley 7.5% (X351)

Regular price £179.00


Uprated supercharger pulley for Jaguar XJ Sport / Sentinal 5.0 ltr 2012 - 2018.

Our pulley gives a reduction of 7.5%, the maximum amount possible without modifying the supercharger snout. These are designed in-house, CNC machined and produced to the highest standards of surface finish and dimensional tolerances of any pulley on the market. This pulley is made from high grade stainless steel for a durable finish and professional long lasting look.

Supercharger pulleys are the most proven and best £/Bhp performance enhancement available for supercharged engines.

Changing the pulley ratio increases supercharger rpm and produces more boost. The direct increase in airflow is seen by the ECU where it will compensate fueling accordingly thus increasing power across the rpm with impressive mid-range. Being the later model ECU's these engines will also benefit from a remap to unleash the full potential with the new pulley allowing peak boost and power to be increased.


Boost & Power Increase:

The 7.5% reduction increases supercharger speed and therefore boost equating to about 1.5psi increase. Typical gains from around 25-30Bhp across the mid range and top end with remapped cars seeing double those figures.


Sale Includes:

  • 1 x Powerhouse 7.5% reduction High Grade Stainless Steel power pulley.
  • Detailed instruction sheet for Installation.



Some basic workshop tools are required to gain access to the supercharger pulley. Removal can be completed with mild heat and a suitable puller for the pulley. If using a conventional puller the radiator may need removing, specific pullers for this engine may only require loosening and moving of the radiator. Alternatively, you can grind off the pulley but some skill is required to do this without damaging the shaft. Installing can be done by heating up the new pulley and sliding onto the shaft.


Part Number




Jaguar XJ Sport / Sentinal 5.0 ltr 2012 - 2018.