Welcome to the boards!
Where in Greece are you located? I had a great time visiting Greece years ago. I stayed in Corfu for some time. Athens too. You live in a beautiful country. And the Greek people are some of the warmest and honest people I have ever met.
I have the Akrapovic race pipes too on my 01. Excellent sound and good power. You will lose 20 pounds off the bike over stock exhaust. That helps performance greatly - both cornering and excelleration. A trick you might have your mechanic do is to add about 1.75 centimeter spacers between the engine block and the bracket that holds the radiators forward. The headers are more forward than stock pipes. These spacers move the radiators forward and provide clearance for the oil lines. Otherwise the headers will heat up the oil coming out of the cooler radiator and may damage the engine. I also wrapped the header pipes with ceramic fiber heat tape from the head down to below the oil cooler and that has cut most of the heat out from that area and my engine coolant runs cooler too. I am completely happy with the set up and like the way it runs ( TRE added).
Let us know how you do with the new pipes.