Swallows Racing 4.2 V8 6.5% Upper Supercharger Pulley

Swallows Racing 4.2 V8 6.5% Upper Supercharger Pulley

It should be law that every V8 supercharger Jag has this mod..

Swallows Racing 6.5% supercharger pulley is the perfect improvement to your 4.2 supercharged format Jaguar.

By reducing the size of the pulley you are adjusting the gearing to increase the speed of the supercharger.

A faster spinning supercharger translates to more BHP and torque all across the rev range up to red line.

Precision CNC machined from Stainless steel, our high quality heat/ press pulleys are extensively tested pulley designs on our race cars.

We have proved that any increase past 6.5% draws too much heat soak. Ultimately loosing BHP when temperatures rise from spirited driving and track time.

Keeping the car at the 6.5% “Sweet spot“ we are able to create stable BHP at all temperatures for extended periods.

Fitment requires removal of the old pulley which can be done here at Swallows. Coupled with our performance remaps will show a dramatic increase in throttle response, torque and BHP.

*Please contact us for individual fitting and mapping quotes.

**Couple this with our fitting/ mapping and SR Pipercross filters in the Stage 1 package for best results