Royal Muffler of Chatsworth, USA made a custom quad setup for the new F10. Here are some photos of their work, and the sound tests as well. Enjoy!
Source: 5post
Royal Muffler of Chatsworth, USA made a custom quad setup for the new F10. Here are some photos of their work, and the sound tests as well. Enjoy!
Source: 5post
The new BMW M5 has officially begun production at the BMW Group Plant Dingolfing, marking …