I have the stage 2 AFE and it sounds incredible. When my friend first drove my car with sw was put in he thought a fast car was next to him but it was my turbos spooling with the intake. My car went from 235wkw 488nm to 275wkw 540nm from the day I had sw flashed on to the dyno 2months later. Not sure when it kicked in but definitely notice my car picking up power
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