Hi there. I recently bought a sports back box for my 2.7 because my stock original was split.
It lasted 1 journey because i found the cabin noise ‘painful’! Especially on the motorway.
Yes it claimed to add extra HP but really loud. Massive! But if thats what your after....
Now this may be because it was on the lower price scale. Perhaps a £1000 and upwards sports box sounds better. Someone no doubt will advise.
I ended up finding a great 3.2 original.
