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Product Summary

Chevy Small Block V8, Dual Spring Valve Spring Style

    Key Specs

    MFG. Part #221442-16
    BrandManley
    Outside Diameter1.560"

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    Details

    Manley's NexTek® valve springs are the latest in valve spring technology. The main benefit of the NexTek® springs is that they resist degradation of spring pressure in the later stages of a race. This is critical in oval track racing, where an engines valve train is abused for a long period of time. The spring inside diameter is chamfered for retainer clearance. The state-of-the-art winding process, thermal treatment and finishing practices cannot be duplicated, making these springs unique. The specially processed premium-grade chrome silicon is virtually free of impurities or surface irregularities, making for a high-quality, high-performance valve spring. NexTek® Series valve springs have been tested by leading engine builders and are confirmed to be the best performing valve springs on the market today!

    • Manufactured from ''super clean'' HiTensile Chrome Silicon steel
    • Shotpeened to MIL Specs for maximum fatigue life
    • Proprietary multistep heat treating minimizes load loss
    • Tightly controlled open end flatness reduces valve stem side loading
    • Tip thickness designed to eliminate overload breakage
    • No degradation of spring pressure in the later stages of a race
    • Specially processed premium-grade chrome silicon that is virtually free of impurities or surface irregularities
    • NexTek® Series valve springs have been tested by leading engine builders and are confirmed to be the best performing valve springs on the market today

    CARB Warning

    For race/ off road use or for use on pre-1966 vehicles.

    Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

    Specifications

    KEY SPECS
    MFG. Part #221442-16
    BrandManley
    Outside Diameter1.560"
    GENERAL
    Valve Spring StyleDual Spring
    Maximum Lift.750"
    Open Pressure660 lbs. at 1.25"
    Seat Pressure260 lbs. at 2.00"
    Inside Diameter.812"
    Sold in QuantitySet
    GTIN Code807298023953