Makes me think back to my early postings on AO when I referred to my greatly modified exhaust system on My Thema 16V turbo. The one particular mod was my self built silencer internal baffle pipe of the same drilled and then the surrounding voided area packed with rock wool fibre glass before I welded the end piece on with it's stainless steel tailpipe.
All worked very well until I did a second stage turbo boost one what was the then M10, whilst showing a Beemer how my Italian rocket could perform. Remember guy's and gals.
Varoom! Whoosh! G force engaged first boost, then I floored the loud pedal at 1ton plus approx for the second power whack to kick in, quick check in the rear view mirror to see clouds of compacted fibre glass exiting the tailpipe, and then expanding its proportions quite significantly!
At the Park Street/St.Albans roundabout ground to a halt and checked my rear view mirror, to see the Beemers pilot with his lower jaw reaching his knees, before I tore off again after giving him the thumbs up! Best fun machine I ever owned,
Fourteen years of devoted nurturing that lovely beast got from yours truly.