Universal 4 port boost control solenoid, typically used with wastegates that have 2 ports. Allows a wider range of boost control than any other method because full boost can be applied on either side of the wastegate diaphragm. This is used when you need more dynamic range than a 3 port solenoid can provide. (We also offer Mac 3 port solenoids). This boost control solenoid will not degrade from rich fuel mixtures or oil.These valves offer extreme durability and are resistant to sticking caused by contamination.
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