Head components

Spring data:

Seat pressure - 75lbs @ 35.10mm
Open (lift) pressure - 191lbs @ 10mm
Spring coil bind - 20.70mm
Rate - 12.10lbs/mm
Max lift - 14.40mm
Outer spring outer diameter: 27.50mm
Outer spring inner diameter: 20.00mm
Inner spring outer diameter: 20.00mm
Inner spring inner diameter: 15.20mm

Set includes:

Dual springs: 16 pcs. SPR-TS1015-Z20
Titanium retainers: 16 pcs. RET-TS5.5-T5
Seat locators: 16 pcs. SEAT-TS-Z20

Spring data:
Seat pressure - 90lbs @ 35.5mm
Open (lift) pressure - 230lbs @ 13.0mm
Spring coil bind - 21.50mm
Max lift - 14.80mm
Rate - 11.50mm
Outer spring outer diameter - 29.65mm
Outer spring inner diameter - 21.85mm
Inner spring outer diameter - 20.50mm
Inner spring inner diameter - 15.50mm

Set includes:
Double springs - 16 pcs. SPR-H1005D-S14
Titanium retainers - 16 pcs. RET-BMS14-T1
Seats - 16 pcs. SEAT-H1002-S14

Product detailed specification
Model number	NEVI-1030-7
Head diameter	30.15mm
Stem diameter	6.94mm
Length	101.20mm
Material	Inconel
Fits for	Nissan Skyline - 2.6 24V (RB26DETT)

Spring data:
Seat pressure - 70lbs @ 38.40mm (intake), 82lbs @ 37.00mm (exhaust)
Open (lift) pressure - 172lbs @ 10mm (intake), 180lbs @ 10mm (exhaust)
Max lift - 11.90mm (intake), 10.60mm (exhaust)
Spring coil bind - 24.90mm
Rate - 10.20lbs/mm
Spring outer diameter - 24.00mm
Spring inner diameter - 16.50mm

Set includes:
Single springs - 40pcs.

Product detailed specification
Model number	SIVN-1050
Head diameter	35.00mm
Stem diameter	5.46mm
Length	103.30mm
Material	Black nitrided
Fits for	Subaru BRZ, Scion FR-S - 2.0 (FA20, FA20D)

Product detailed specification
Model number	HIVN-1021D
Head diameter	35.50mm
Stem diameter	5.48mm
Length	108.85mm
Material	Black nitrited stainless steel
Fits for	Honda - 2.0 2.4 (K20, K24)

The 6000 Series Competition Valves are designed to provide excellent reliability in an environment of high spring pressures and roller cams, at a budget price. They have higher fatigue resistance and tensile strengths than our competitor’s best offerings.

To manufacture the valves we use our exclusive two-step slow forging process using EV8 stainless steel on both intake and exhaust valves.We provide a special heat-treatment and stress relieving process, along with hard chrome stems and friction-welded hard tips. We finish with a swirl polished head. The valves feature flow improvements to deliver the power needed for today’s sophisticated racing engines.

The Super Alloy Engine valves represent the highest level of sophistication in valve technology. These valves are designed to handle the extreme heat requirements and punishment of today’s Nitro Fuels, Supercharged, Turbocharged, Nitrous Oxide, and Marine race motors.

Product detailed specification
Model number	HEVI-1006F
Head diameter	30.00mm
Stem diameter	5.45mm
Length	106.45mm
Material	Inconel
Fits for	Honda H22A / H22A4

Valve springs data
Installed seat pressure - 34kg (75lbs)
Load - 63kg@10mm (140lbs@10mm)
Max lift - up to 12mm
Made from chrome-silicon steel SAE9254-V
BMW / Toyota - 3.0 24V Turbo (B58, S58)
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 7500 RPM.
Kit includes:
24 pcs. conical valve springs
12 pcs. titanium retainers 5mm
12 pcs. titanium retainers 6mm