IVE NEVER FITTED AN AFTER MARKET ONE, BUT THE OEM DV WENT ON MINE AFTER BUYING IT AFTER 2 WEEKS, AND IT WAS REALLY EASY TO REPLACE. I ALSO BOUGHT NEW JUBILEE CLIPS AS I WANTED TO DOUBLE CHECK NO AIR WAS LEAKING?
TO BE HONEST I RECKCON AN AFTERMARKET ONE WILL BE EASY TO....IM A NOVICE AND IM GOING TO GIVE IT A GO MATE!
IF ALL ELSE FAILS, JUST PUT THE OLD ONE BACK ON!
HOPE THIS HELPS!
OH BY THE WAY..I HAVE AN A3 NOT S3...BUT I THINK IT WILL BE THE SAME PRINCIPLE.
IL TAKE A PICTURE AND SHOW YOU WHAT IT LOOK LIKES IF YOU WANT?...BUT AGAIN I DUNNO IF IT WILL BE IN THE SAME PLACE.
BUT YOU LL GET THE IDEA?