Dunstall Exhausts on a Cali 1100i

Anyone had any success with Dunstall exhausts on a California 1100i? Available from Classic Bike Shop ( on the web and very reasonable priced.
Particularly want to know how loud and if any re-mapping is required.


Have fitted everything from Harley meggas to 2 into 1 gazelle exhausts on many and various Guzzis, have never had to adjust anything on the fuelling side, but, to be fair, these were not injected bikes. Would be surprised if re-mapping is required, as to the noise, if they can hear you coming, they might not pull out on you.