These springs eliminate float and bounce at high RPM, resulting in constant power delivery. Must be used with Billet cams

Fits :
XJ6 [Series I] (1968-1973)
XJ6 [Series II] (1973-1979)
XJ6 [Series III] (1979-1987)

E-Type [Series I] (1961-1968)
E-Type [Series II] (1968-1971)

Jaguar Mk1 (1955-1959)
Jaguar Mk2 (1959-1967)
Jaguar Mk10 (1961-1970)

XK120 (1948-1954)
XK140 (1954-1957)
XK150 (1957-1961)