I have DB information as i do lots of track days but i didnt think it was relevant.

Running an RS with Samba chambers and end cans did this to me last year...

Donington Quiet Day 98 BD ... Drive Through...

The DB meter is on the bridge over the start/finish striaght ... If you 'back off' under it and you are over the limit you will get away with it. But it's tourture and when i went full chat ... I got black flagged at 100 .... now thats drive by....

A month later at Oulton Park with 'Static Noise' testing at 102DB i thought i would be ok!

No, i was banned from going on track at 105DB Static...

I havent really understood the difference in the test methods but a Donington 'Noisy Day' should be ok ... I have done these on the RS.

On a separate note,on standard pipes i havent been banned from anywhere on the RS ... they are longer slip ons ... and the longer the slip on is the better chance you have of being in tolerance.

I have had Samba make some longer slip ons .... hope it calms the DB down a little