I only close my flaps on the highway and thats not because its unbearable in anyway its just nice tohave the option and quiet it down a bit. If installing the vaccuum lines is very difficult or relatively expensive I would suggest avoiding it, you will love that exhaust as Fan stated above its how these cars should sound from go!
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SOLD - 2013 1LE - Pat G Spec'd Cam, NPP with 1 7/8" Long Tube Headers with High Flow Cats, Intake w/scoop, Ported Throttle Body, and Apex 1.25" Lowering Springs.
J-Rod Built and Matt@FSP Tuned
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