for fixed metering needles
MG MGB
Jaguar XK120 and XK140 with SU-H6 carburettors (1948-57) • XK150 with SU-HD6 carburettors (1957-61) • XK150S with triple SU-HD8 carburettors (1957-61)
Locking screw
MG MGB
Jaguar XK120 and XK140 with SU-H6 carburettors (1948-57) • XK150 with SU-HD6 carburettors (1957-61) • XK150S with triple SU-HD8 carburettors (1957-61)