These pulleys are not a bolt-on fit. The original pulley has to be removed using a special puller tool, or partially cut and removed with a universal puller, then the new pulley has to be heated prior to fitting.
Jaguar XJR 4.2 V8 2007 supercharger oil service refill kit X350
Jaguar XJR 4.0 XJ6-R 1994 supercharger oil service refill kit X300 X306
Jaguar XJR 4.0 V8 1999 supercharger oil service refill kit X308
Jaguar XJR 4.0 Eaton M112 supercharger oil refill kit 1998 1999 2000 2001 2002
Jaguar XJR 4.2 V8 2003 supercharger oil service refill kit X358
Jaguar XJR 4.0 V8 2000 supercharger upgrade performance pulley 6% stainless X308
