got one of these on my 160, highly recommended! Not really loud, but a nice sporty sound, can make u sound like u are going faster than u actually are though lol. Always get bollocked for speeding off when im driving normal cause people can here it. Looks the nuts too!
yeh it is just the backbox, going to get the rest of the system soon too, which will make it sound better and louder. Just has a nice sporty grumble to it at the moment, is a fair bit louder than standard though.