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.
SUPERCHARGER OUTLET ELBOW / INLET MANIFOLD DUCT Jaguar XJR XKR V8 (Eaton M112)
Jaguar XJR 4.2 V8 2007 supercharger oil service refill kit X350
Jaguar XJR 4.0 V8 1999 supercharger oil service refill kit X308
Jaguar XJR 4.2 V8 2003 supercharger oil service refill kit X358
Fan Drive Aux Belt for Jaguar XJR XK8 XKR XJ8 3.2 & 4.0 V8 DAYCO OEM NCA2211DA
Jaguar XJR 4.0 V8 1999 supercharger upgrade performance pulley 6% stainless X308