[75evo]

Hi Greg,

I think you should look into a dual mode exhaust. There is this muffler from Flowtech called the Warlock. What you can do is choose between a boost activated butterfly valve or a electronic (operated by the driver) butterfly valve. The Warlock muffler has 2 paths. You should attach the butterfly valve to the straight through path. When the butterfly valve is opened, it allows the exhaust to go straight through the muffler. When it's closed, the exhaust gas will have to go through 3 chambers. Make the pipe from the chambered path of the muffler be small when you are in quiet mode. That added with the regular GTV6 S-bend tail pipe and you will have a really quiet exhaust.