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SUPERTECH Single Valve Spring Kit Nissan RB25DET

New product

SUPERTECH single valve spring kit for Nissan RB25DET engine. Complete kit for all 24 valves (springs, retainers, exhaust seats). OEM intake seats kept. 2 pressures available: 78 lbs @ 30.6 mm (SPRK-1012S-RB25) or 80 lbs @ 30.6 mm (SPRK-2081-RB25).

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1 067,47 € tax incl.

-30%

1 524,96 € tax incl.

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  • SUPERTECH single valve spring kit for Nissan RB25DET engine, complete kit for all 24 valves. Available in 2 installed pressure levels to suit different camshaft profiles.

    Common technical specifications

    • Manufacturer: SUPERTECH
    • Origin: Made in USA (San Jose, California)
    • Type: Single valve spring kit
    • Application: Nissan RB25DET (all versions: S1, S2, NEO)
    • Installed height: 30.6 mm
    • OEM intake seats kept

    Kit content (per part number)

    • 24 valve springs
    • 24 retainers
    • 12 exhaust seats
    • Compatible with OEM intake seats

    Available part numbers

    • SPRK-1012S-RB25 (78 lbs @ 30.6 mm) - SPR-TS1012-SI springs + RET-NVG1014/T1 retainers + SS-2820E seats
    • SPRK-2081-RB25 (80 lbs @ 30.6 mm) - SPR-TS1015-SI springs + NVG1015/T1 retainers + SS-2820-E seats

    Pressure selection guide

    Installed pressure must match the camshaft profile used:

    • 78 lbs: recommended for OEM or lightly upgraded cams (moderate lift), street/light track use. Gentler solution that limits cam and guide wear.
    • 80 lbs: recommended for performance cams (higher lift, higher RPM), drift/track/drag use. Better high-RPM resistance against valve float.

    Components in each kit are matched: do not mix items between the 2 part numbers.

    SUPERTECH is a leading American manufacturer of high performance valvetrain components (valves, springs, seats, retainers) for motorsport applications. Its products are designed and manufactured in the USA to aerospace-grade precision specifications.

    Applications

    Compatible with Nissan RB25DET engines (all versions: S1, S2 and NEO):

    • Nissan Skyline R33 GTS-T (ECR33) - RB25DET S1 et S2
    • Nissan Skyline R34 GT-T (ER34) - RB25DET NEO
    • Nissan Stagea WC34 (R33 wagon) - RB25DET
    • Nissan Stagea WGNC34 (R34 wagon) - RB25DET NEO
    • Nissan Laurel C34 et C35 - RB25DET
    • Nissan Cedric / Gloria Y34 - RB25DET NEO

    Important: for the RB25DET engine, OEM intake seats are kept (the kit supplies exhaust seats only). The complete kit covers all 24 valves of the RB25DET engine. Best used with dedicated SUPERTECH valves (NIVN-1052-12 intake and NEVI-1052-12 exhaust).