Standard pipes (rear exit) are very quiet.
The sidepipes above are also standard factory fit and are much more noisy, though boshly's recorded 93db (loudest) at the aero centre meet which would still get you on any circuit in the UK and I'd imagine would still be passed for road use just about anywhere.
The loudness comes at the top of the rev range in the sidepipes - so at 6000rpb, it's pretty vocal.
Standard rear pipes are nice sounding, but very quiet in comparison. I'd hazard around 84db based on the comparisons made at the first uk aero centre meet. (there may even be figures on that thread as cerial took measurements of many standard set ups)..
