I sold my 08 3 door S3 back in 2012 and last week I bought a 59 plate S3 Sportback S-tronic.
I fitted my BBS CKII's the next day and this morning I fitted some H&R springs to sort the ride height.
While the car was jacked up i found it had a full milltek system inc sports cat, no wonder it sounded different to my old S3
Now I was planning on a remap at some point but something tells me why would you fit a sports cat and not remap it. The car doesn't feel remap quick like my old APR'd S3 was so it may have been turned off or removed by the dealer. So without going back to the original owner how can I tell?
Next on the list is cruise, then roof rails and then possibly a retrofit of the auto lights/wipers (yeah I know its a biggie)
Maybe the car is known on the forum, does the plate ring a bell?