Phone Clip: ECS B8 S4 3.0T Valved Resonated Exhaust w/ high flow cats | Deacceleration/Revving 

Deacceleration, mild acceleration, free-revving.
Where I buy car parts from:
Affiliate Links
ECS Tuning → bit.ly/ECSTuni...
Turner Motorsport → bit.ly/TurnerB...
Vehicle:
-2013 B8 S4 3.0T
Exhaust setup:
-ECS Tuning valved exhaust with resonator
-400 cell aftermarket high flow catalytic converters
Testing conditions:
-Parking Lot
-Cold Day
Equipment:
LG G6