i know how it works this time :P
a smaller supercharger pulley will run faster, so it gets more powerful.
i found 2 pulleys from web, they are both a single part, look like no need to change belt.
so, anyone give me an advice, which pulley is better?

17-0400 - Pulley Upgrade Supercharger

or

Jaguar XKR 4.0 Supercharger Pulley – Upgraded supercharger pulley

or who has better idear?
thank you, i love you all than my xkr~~~

 

Hi Riem-

See this thread: https://www.jaguarforums.com/forum/x...entures-46329/

 

thank you very much! cut and heat~~~~I'd rather give it up, because i can't find a workshop or dealer like to do these.

anyway i must thank you, you wake me up.

btw, a puller tool is good idear~~mmmm