Triumph Inlet-Valve Guide 650cc Std. Triumph Inlet Valve Guide 350/500/650 cc PRE UNIT + 650 cc UNIT STD size Made in England These can be used fo 3T 1947, with 2 modifications (E1759) 1 mm too long under head The collar needs to be turned a little smaller. Länge: 56,4 mmAD 1/2" = 12.7 mm