you can doubt as much as you want bro i have a straight through and they didnt say a thing about it, the only problem was it was too low and they let me of on the condition the car be raised
if i was to put a split dump pipe i may as well pull my whole exhaust out and fix the problem properly. but putting a screamer will do fix the problem just fine..
im really not fussed on what is legal or illegal, this post was purely just for my own general knowledge of what is aloud and what isnt.
i dont know anyone who would would want a quiet performance car anyway.
im a red p plater which means i get picked on irrelevant of what is legal or illegal on my car so or if ive done something wrong or if the pulled me over for no reason i really couldn't car less bout the f**king cops