Originally Posted by
Roelof
The EFRA number is a homologation number. In other words, every exhaust carrying that number needs to be a copy of the one that is homologated.
Mostly a different brandname is just written on it by the original manufacturer (OEM)
I read the EFRA rules in its entirety and couldnt come to this conclusion. Perhaps my reading comprehension just isnt that good but about the only thing that I could surmise to be the same was the db level.