Check out this Porsche Panamera 4S fitted with an ARMYTRIX Catback exhaust system producing a loud exhaust sound! The video includes the Porsche Panamera 4S doing some revs and then a loud acceleration! What do you think of it's sound?
VIDEO: LOUD Porsche Panamera 4S w/ ARMYTRIX Catback Exhaust! REVS & Acceleration!
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