- Thu Mar 17, 2011 10:35 pm
#2905913
I've only got a DC cat back, but was reading 103dB on static test at 4500rpm (the track i use has a very understanding tester who never seems to notice i'm not giving him the 5500 he asks for). Not sure what It'd be like on a drive by reading - the bung does make a difference though and drops it by about 5dB, however you also get a knock on impact in performance.