SpeedFactory Racing 4-Port Boost Control Solenoid Kit (External Wastegates Only) - 4-Port Solenoid Only - SF-01-052 3/8 NPT Air Temp Sensor protruding just enough to show

protruding just enough to show off the COBB logos etched into the top of each polished tip

Instructions will help with this process

Our variants are designed specifically to prevent these issues

This kit is a new take on the popular drag setup that leans the K-series engine forward for more clearance for big turbos in the back or improving intake systems for running individual throttle bodies on the front

Subaru High Flow Filter for 02-07 Subaru WRX / STi Washable/Reusable Cotton Woven Media

SpeedFactory Racing 4-Port Boost Control Solenoid Kit (External Wastegates Only) - 4-Port Solenoid Only - SF-01-052 3/8 NPT Air Temp Sensor protruding just enough to showThe 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