This product is built with a predetermined actuator spring suitable for at, or slightly above factory boost levels. The actuator can be assembled with a stiffer spring upon request. Please contact us directly concerning this process It is designed and built with the intention of increasing the boost output of a turbocharged system. We cannot guarantee compatibility with all applications, nor the ability to increase the boost output beyond a level that is within the parameters set by the engine-management-system of the given vehicle at the time of installation, whether that system is factory or aftermarket.
You are buying this Genuine FORGE Actuator Piston type with BLUE spring included
The spring colour codes and their running pressures are as listed below.
Green – 10 psi (0.7 bar)
Purple - 13 psi (0.9 bar)
Yellow – 15 psi (1.0 bar)
Blue – 18 psi (1.2 bar)
Red – 20 psi (1.4 bar)