Brake Servo. 2.25:1 power ratio.
also known as part# C19612
Fits:
XK120 - (OTS,FHC & DHC)
XK140 - (OTS,FHC & DHC)
XK150 - (OTS,FHC & DHC)
XK150 S - (OTS,FHC & DHC)
MK I / MK 1
MK II / MK 2 - (2.4, 240, 3.4, 3.8 & 340)
MK VII / MK 7
MK VIII / MK 8
MK IX / MK 9