Hi,
When checking eBay yesterday, I came across this company in Germany which is selling a Modified OEM Muffler for the 2.5 and 2.7 cars. They claim a decibel reading of 105db.
The interesting thing is that it appears to be simply a couple of SS Tubes welded into the Muffler Intakes on either side which are then routed directly to the TailPipe.
They want some $500 for this Modified Muffler. But, I bet you could get a local Welding Shop to do the work for $100-$200 at most. Check out the pics and see for yourself. Listing at:
http://cgi.ebay.com/Porsche-Boxster-2-5-986-Sport-Sound-Muffler-Exhaust_W0QQitemZ8033988986QQcategoryZ38786QQrdZ1Q QcmdZViewItem ...
Happy Motoring!... Jim'99