Originally Posted by lagodcm
You know what a train sounds like??
Depending on your tune, When the gate opens at a set psi it will sound like you took your headers off. I had a 06 wrx with a 20g EWG 44mm pushin 21 lbs. At around 10 psi it opened and it would scare people I passed.
did you have to upgrade your injectors/fuel pump?