Right just thought I'd add my experience with the vw 1.4 16v AHW engine and tuning I'd like to start by saying I am aware these engine aren't very strong and can't handle loads of power reliable. I will also say I don't claim to know much about these engines but this is just my experience. I found the driving experience can be improved with only a few mods but first off give the engine a good service new oil and filter. Check the crank case breather and replace or clean as needed new spark plugs, check ht leads and coil pack for corrosion replace if needed. Then you want to find your self the inlet manifold, throttle body and air box off a polo 6n 100bhp. The reason you need to change the air box is because the throttle body is bigger you could get an induction kit but the standard air box seems quite good with a k&n panel and removing restrictions in the box it's self. I also remove the hot air intake in summer and refit in winter. I did not bother with the injectors but you could fit the 100bhp injectors as well. I found the car reves loads faster after 3.5rpm and even at low reves it seems to have more torque. For me this has transformed the car for less than £150 I also have a decat witch helps a bit but does not make a massive difference. I drove a totally standard lupo last week with a 1.4 16v AHW and it felt dead compared to mine and that's why I wrote this thread. My car has not been mapped yet so am sure more power will be found. The car took about a week before it had learnt the throttle body. When I first fitted the parts it idled really high and generally drove like **** at which point I nearly removed it all but after a week it was perfect. The egr need to be removed and blanked to fit these parts. My car is getting a full stainless exhaust system with a 4-2-1 manifold in a month and I would think this will improve it also. Then a remap my be in order.