Just got this mod done but when I went to film before and after, I saw that flap was already open on idle. Mod was simple and didn't need to lift the car. I needed wife's car so didn't have the chance to experience the difference in the sound yet.
Update: it does sound better around 20-40 MPH.
Thanks guys for posting this mod.
Last edited by mcho3; 07-01-2016 at 12:34 PM..
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