DIY 3 Inch Valvetronic Exhaust Muffler | Stainless Steel

#gpgarage #diy Hello everyone, DIY Stainless Steel 3Inch muffler with Electric valve. Car specs Bmw e39 523i M52TUB25 oem engine. Cat-back 3inch exhaust without middle resonator. This is perfect solution for daily driven cars. For more videos like this check my channel. Thanks for Watching.