What does this VP44 mod/part do?

[samiam]

What's this
http://cgi.ebay.com/V6-Tuning-Duese...eile_Zubehör?hash=item414be502c9#ht_552wt_941
My German isn't up to a detailed analysis of it.
Your explanation/opinion greatly appreciated

 

[adamss24]

They are Race injector nozzles... Unless you have a big/hybrid turbocharger and a healthy pump + a custom remap, then there is no way you should fit these as they would smoke like hell and will shudder as well...