AVO's are easily adjustable using a knurled 'nut' so can be tailored to your preference very easily. Beware of aftermarket exhausts. The one fitted to my Roadster had a resonance which came in at 70 which made motorways a real chore. I switched back to standard and don't regret it for a minute. Interestingly though, the chap who bought my sports system despite my warnings, loves the noise. So horses for courses.
