Took my car from bone stock (with malfunctioning boost solenoid, so 6 psi) to 15 psi with dyno results for each boost step. Just for giggles I installed the 3SX Custom Cold Air Intake Box with Filter, not expecting much if any gains. Much to my surprise (and pleasure) I went from 308 AWHP 332 AWTQ to 316 AWHP, 342 AWTQ. A gain of 8 AWHP and 10 AWTQ. Installation was fast, so the change in power was not due to the car cooling off or something like that.