Valve springs
Jaguar: XK120, XK140 and XK150 (1949-61) ? Mark I (1955-59) ? Mark II (1959-69) ? E-Type Series 1 and 2 (1961-70) ? Mk5 (1948-51) ? Mk7, Mk8 and Mk9 (1950-61) ? Mk10 (1961-66) ? 420G (1966-70) ? S-Type 3.4 and 3.8 (1963-68) ? 420 and Daimler Sovereign (1966-69) ? XJ6 4.2 Series I, II and III (1968-87) ? Daimler DS420 Limousine and Hearse (1968-92)
'Fast Road' specification to allow the engine to rev to 7.000 rmp and 0.415” to 0.440” cam lift. Supplied in sets of 12 inner and 12 outer springs
Manufactured from superquality silicone wire, their resistance against fading and breaking is extremely high. They can be fitted directly to the head with no fear of spring crush and enable the use of higher lift cams. Recommendable for fast road and race engines. Must be fitted when using competition valves.
? seat pressure: 86 lbs
? pressure at full lift: 165 lbs
? free length: 1.96"
? outer diameter: 1.15"
? inner diameter: 0.64".