Thanks Gnasher, very helpful.
Excuse my ignorance...what's a resonator delete and suitcase delete?
Cheers
You're standard exhaust has 2 boxes in it. One (closer to the front, long triangular shaped box) is the resonator. People have removed this one for a reasonable increase in sound. The downside of this is that doing it can make the car drone at certain revs.
The backbox is (obviously lol) the box at the back. This can be replaced by a Y pipe to also increase volume. Ffrom what I've seen, this can be louder than the resonator delete.
Obviously before getting your exhaust modified, I'd be tempted to check one that's been done already as you might not like the sound.
I personally bought the Milltek, but I wanted better looking tailpipes too.
You don't want to buy a DTUK tuning box do you? I've got one for sale in the classifieds lol.