The old and the new. My son gets the old which has a beautiful exhaust system in it. I thought I'd swap them out, but he's driving to school and the two things he loved the most are the exhaust sound and the brakes. I lost heart to that away from him; so I've been thinking inexpensive custom exhaust for my new G... so far Megan headers and Kinetix HFC'S. A clip below shows it running with the exhaust disconnected.