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

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

Instructions will help with this process

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