Dump Valve Spring (Single)-Colour Blue

These are the individual springs sold in our FMDVTUN kit. Please select the colour you require using the options above.Valve Spring color coding: Green - 5-15 PSI, Yellow - 15-23 PSI, Blue - 23-30 PSI, Red - 30 + PSI*The above figures are estimates and should only be considered as a guideline*Note: The quoted spring pressure (PSI) relates to the un-assisted clamping force of the spring and should NOT be taken as an equivalent to boost pressure when determining suitability. Once a valve is fitted to a car it is subjected to various pressures that act upon the diaphragm or pi