Part number: FCPPA845085RS6
Manufacturer: FCP Engineering
Forged high performance pistons for various applications in nearly all engine types for racing and street use.
Made of 4032-T6, piston skirt is molibden coated.
Each set of pistons also includes rings and HD series pins.
Bore size: 84.50mm
Compression ratio (CR): 8.5:1
Compression height: 30.70 mm
Pin diameter: 21mm
Stroke: 93.00mm
Audi RS6 C5 - 4.2 40V V8 Biturbo (BCY, BRV)

Spring data:

Seat pressure - 80lbs @ 36.00mm
Open (lift) pressure - 205lbs @ 10mm
Spring coil bind - 12/17mm
Rate - 12.60lbs/mm
Max lift - 13.90mm
Outer spring outer diameter: 25.00mm
Outer spring inner diameter: 18.00mm
Inner spring outer diameter: 18.00mm
Inner spring inner diameter: 13.00mm

Set includes:

Dual springs: 24 pcs. SPR-TC25D-VR6
Titanium retainers: 24 pcs. RET-K20A3-TC25
Seats: 24 pcs. SEAT-VR624

Spring data:
Seat pressure - 73lbs @ 38.60mm (intake), 85lbs @ 37.20mm (exhaust)
Open (lift) pressure - 178lbs @ 10mm (intake), 109lbs @ 10mm (exhaust)
Max lift - 12.50mm (intake), 11.00mm (exhaust)
Spring coil bind - 24.90mm
Rate - 10.50lbs/mm
Spring outer diameter - 24.00mm
Spring inner diameter - 16.50mm

Set includes:
Single springs - 20 pcs. SPR-A2416-5
Titanium retainers - 20 pcs. RET-A2416-N2

Set includes:
1 cylinder head gasket (0.9x83.50mm)
1 valve cover gasket
1 intake manifold gasket
1 exhaust manifold gasket
1 universal sealing compound
2 camshaft seals
16 valve seals
and etc.
Fits for:
VAG group belt driven engines (Audi, Seat, Skoda, VW) - 2.0 16V TFSI EA113 (AXX, BGB, BHZ, BPG, BPJ, BPY, BUL, BWA, BWE, BWT, BYK, BYD, BZC, CDLA, CDLB, CDLC, CDLF, CDMA)

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.

Athena Racing 338-series multilayer steel (MLS) cylinder head gasket.
Athena MLS gaskets are designed to suit the requirements of today’s competition engines offering enhanced sealing compared to the OEM product. The gaskets are assembled from 2-5 layers of high quality stainless and spring steels.
Part number: 338284R
Gasket thickness: 1.20mm
Bore size: 83.00mm