Hi, I’ve just read about (Cambridgeshire) Police stopping bikes and cars for loud exhausts. Does anyone know the db levels from Roush axle backs? I believe that the legal limit for road cars is 74db. Thanks.
Oh! Fingers crossed that I don’t get stopped...i did a track day where they measured the DB at 4k RPM and mine was 95DB. Just to note i'm literally just stock except the roush ABs on the exhaust front, there was a guy there with a pony which was literally straight piped and on silent mode he blew 110DB... then he went track mode... and got banned from the track day lol
Just done mine on normal cold start 101db settles to 84db in normal mode then down to 75.2 in quiet mode standard exhaust plus h pipe but check my videoSo.. a mate of mine has just come around with a decibel reader he bought at Aldi/Lidl, cost £10 or so.
My Mustang has an MBRP street version cat back. It's a 3" stainless with H-pipe, no other mods. It's not overly loud compared to some others.
Anyway... On cold start it is 88db, settles to 78db on idle, then 95db at 2k steady revs, blipping the throttle got 101db. Didn't rev it hard, engine hadn't warmed up.
So assuming that most of us who have cat backs are gonna over the 74db limit.