If its for a K04 tuned car (Ie Stage2+ Cupra) you need the stronger spring supplied with it
 
got it on my car and much better than the standard one i had but i didnt have the latest version right pain to fit on ko3 easier with ramp lol
 
I hear they have problems on K04 engines and are working on a fix

Anyone know the new part number of this item if its out ?
 
they have fixed this issue and the new parts are available from AMD and Balance Motorsport to name a few. I think it comes as an 'upgrade kit' along side the existing product and you just swap the piston and spring.

Be interested to hear the results, not many people have reviewed it and those that have are a little washy in their reviews.