SpeedFactory Racing 4-Port Boost Control Solenoid Kit (External Wastegates Only) regular D series - Lash measured

D series - Lash measured at the valve tip needs to be set to 0

which produces a sine wave

Laser-etched SpeedFactory Racing logo

Our pots are manufactured in-house using high quality aluminum materials and feature laser-cut components and head flanges to ensure a perfect fit every time

My car has drum brakes

SpeedFactory Racing 4-Port Boost Control Solenoid Kit (External Wastegates Only) regular D series - Lash measuredThe 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