SpeedFactory Racing 4-Port Boost Control Solenoid Kit (External Wastegates Only) regular SpeedFactory Racing -16AN Cast Thermostat

SpeedFactory Racing -16AN Cast Thermostat Housings are designed to replace your factory thermostat housing and allows you to easily adapt -16AN hoses and fittings to your engine's cooling system

We've made improvements and fixed the parts that break so that you can make better and more consistent shifts

This is a maximum boost at 100% duty/normally closed solenoid

to help eliminate the dreaded 1-2-1 or 2-3-2 mis-shift

unnecessarily large and heavy

SpeedFactory Racing 4-Port Boost Control Solenoid Kit (External Wastegates Only) regular SpeedFactory Racing -16AN Cast ThermostatThe SpeedFactory Racing 4 Port Boost Control Solenoid Kit allows precise boost control with a PWM (pulsewidth modulation) signal from a source (Engine Control Module or Electronic Boost Controller). This solenoid can raise the boost level as high as 6 7 times the spring pressure of the wastegate and offers very precise control at very high boost levels. The 4 Port Solenoid also allows you to use much lower wastegate spring pressures for better boost