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Hello
Has anyone got a milltek hx hyperboost diverter valve, seen one on a rs4 b5 looked well nice, but are thay any good or just engine bling!
If anyone has one or knows about it can you let me know
Thanks
Jason

Sounds like the Stratmosphere HX Hyperboost DV (undoubtedly the same thing) - look nice (had a pair on my car) - but the pistons need re-greasing from time to time, and the double O-rings need checking too. Piston DVs can get stuck if not maintained properly, and the O-rings can perish causing leaks.

Go for the 710Ns if on a budget, or (if you have the cash to splash on HX's) get the APR-R1's instead. IMHO etc...