Audi S4 RS4 2.7 Biturbo ARP cylinder head stud kit 204-4105

Part number 61-31350-00
Victor Reinz MLS cylinder head gasket set
Audi A4, A6, S4, Allroad - 2.4 2.7T V6

Part number 61-33500-00
Victor Reinz MLS cylinder head gasket set
Audi RS4 - 2.7T V6

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.

Spring data:
Seat pressure - 60lbs @ 36.60mm, exhaust - 80lbs @ 33.20mm
Spring coil bind: intake - 23.00mm, exhaust - 19.50mm
Max lift: intake - 13.60mm, exhaust - 13.70mm
Rate: intake - 6.70lbs/mm, exhaust - 10.00lbs/mm
Intake single spring:
Outer diameter - 20.60mm
Inner diameter - 14.40mm
Exhaust double spring:
Outer spring outer diameter - 29.10mm
Outer spring inner diameter - 21.90mm
Inner spring outer diameter - 20.50mm
Inner spring inner diameter - 15.50mm

Set includes:
Intake springs - 18 pcs. SPR-A2095
Exhaust springs - 12 pcs. SPR-H1002D-AU
Titanium retainers: 18 pcs. intake RET-AU5VI-T2, 12pcs. exhaust RET-AU5VE-T1
Seats - 12 pcs. exhaust SEAT-H1000