Hairy bottom

My stage 3 exhaust seems to be putting its packing all over the rear of the car giving it the hairy bottom look
The last time I had this was on my old S1 elise with a mk 1 elise parts exhaust, the end result was a very very loud exhaust! Had a larini on my S2 without any trouble.
My current exhaust seems to be getting louder now but I am not sure if this would be a warranty claim or not? exhaust is not quite 12 months old.
The only thing the exige and the S1 have in common is they both pop and bang alot, the S2 never did, I am sure this cant help but I cant really do anything about it as car is totally std other than the exhaust.
So has anyone else had this? is it normal? is it just a case of wait till its fubared and get a larini or tubular 8"?

Boothy

You normally shave yours don’t you Boothy?