My S1 has a quad exit system fitted from Infinity exhausts in Bristol. In 2012 it was £500 for a SS system.
It is louder than stock as we now have 1 small silencer each side raft of the rear most cats. let me see if i can find the cold start vid……
[video:youtube]
https://www.youtube.com/watch?v=3J0yzvuroMw[/video]
Under load it is good, Tunnels excellent and touring fine. Classic le mans (1000 miles), scotland (1200 miles) and this weekend goodwood (400 miles)
