Saw this on http://cgi.ebay.it/KIT-TURBO-FIAT-500-ABARTH-200CV_W0QQitemZ110301531631QQihZ001QQcategoryZ126579QQrdZ1QQcmdZViewItemQQ_trksidZp1713.m153.l1262 ebay.

I'll translate
KIT I GET UPSET UPGRADE FIAT 500 ABARTH BEYOND 200CV
After varied studies (to have a good reliability of the means united to services raised) ...I have the pleasure to propose a KIT  UPGRADE for the FIAT 500 ABARTH! 

The greatest power that obtains varied from the type of mapping used and from the presence or except for of the SOLE intercooler increased.  The kit allows to have the higherst bhp gain without opening the engine (strenghtening it).

Simple,  easy installation and CLEARLY SUPERIOR POWER to the SS kit!!! 

The kit includes: 

 

* exhaust manifold in stainless steel 304 * turbine * specific downpipe * station and terminal of discharging
* carbon airbox and fresh air fed

 

Possibility to personalize the kit with intercooler with water injectors...

So to my mind thats just a power increase with no handling pack. Lots of crashed Abarth 500s with no warranty and for €2500 Doesn't sound like great value to me.

Mmm. I really can't see the issues with the factory supplied Esseesse upgrade kit. Car log book is upgraded, parts under warranty, costs 2.5k fitted with engine power and sus/brakes upgrades and if you fit it straight from the off, you can likely generate upwards of 1K to offset against the cost of the kit by selling the new original parts.