Audi S6 RS6 5.0 5.2 V10 TFSI FSI FCP valve spring kit + titanium retainers
Part number FCPVSTRATSI/40.
FCP Egineering high performance nickel plated valve single spring kit with titanium retainers.
For:
Audi RS6 C6 - 5.0 V10 TFSI
Audi S6 C6, S8 D3, R8 - 5.2 V10 FSI