Audi S4 RS4 2.7T 2.8 3.0 30V FCP valve spring and retainer kit

Valve springs data
Installed seat pressure:
Intake valve spring - 25kg, exhaust double valve spring - 36kg
Load: 
Intake - [email protected], exhaust - [email protected] 
Max lift:
intake - up to 11mm, exhaust - up to 12.7mm
Made from chrome-silicon steel SAE9254-V 
18 pcs. intake valve single springs
12 pcs. exhaust valve double springs
18 pcs. intake titanium retainers
12 pcs. exhaust titanium retainers
Fits all V6 2.7 2.8 3.0 30V Turbo/NA Audi / VW engines. 
With this set the risk of valve flutter and a possible engine failure is minimized.  
Recommended for engines with series and racing camshafts and over 7600 RPM. Titanium retainers are very strong and light, they help to eliminate valve float. Weight is only 9 and 4 g.