Hi guys new to the owners club , had my 2005 s line a4 convertible for 6 months now , hoping more power with it being a 2.5 tdi but not really impressed, with the torque , so new uprated clutch fitted today and remap next week , any other mods worth doing on this engine and model ....??

You could replace the catalytic converter with a decat pipe to improve the throttle response.  Petrol cars won't pass the MOT without a cat, but the word on the street is that diesels will.

 

Also, cleaning the MAF sensor (carefully), EGR valve and inlet manifold will return a lot of the car's original performance that has been sapped by a build-up of oily soot in the induction system.