Product Summary

Chevy LS V8, Aluminum, Natural, Natural

    Key Specs

    MFG. Part #GMLS2004M
    BrandLS Classic

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    LS Classic Series Gen IV Valley Plates incorporate a high efficiency breather assembly and port for superior crankcase ventilation. Precision CNC-machined from 3/8” billet aluminum, the plates replace the stock cast aluminum 11 bolt valley pans on late model, Gen IV LS engines. Integral O-ring bosses on the bottom side of the valley plate blocks off the Displacement on Demand passages (No other DOD delete kit is necessary). Installation requires relocation of the oil pressure sender (a remote mount is included). The valley plates are available with a cast finish and include all of the necessary O-rings, seals, and stainless steel fasteners. Breather valley plates have NO provision for oil filling.

    GMLS2004M Gen4/LS2/3/7 Breather Valley Plate

    • Machined from 3/8” billet aluminum plate
    • Replaces the stock 11 bolt valley pan in LS3/Gen 4 LS engines
    • Incorporates a high efficiency breather assembly and external port for superior engine breathing
    • Integral O-ring bosses block off the Displacement on Demand passages. No other DOD kit is necessary.
    • Requires relocation of the oil pressure sender, a billet aluminum relocation mount is included
    • Includes all the necessary O-rings, seals, and fasteners
    • Available with a raw machined or semi-gloss black powder coat finish
    • Valley plate works with all LS Classic intake kits
    • Plate has NO provision for filling oil
    • Made in the U.S.A.


    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.


    MFG. Part #GMLS2004M
    BrandLS Classic
    Material TypeAluminum
    Hardware IncludedYes
    Oil Fill Cap IncludedNo
    Overall Thickness0.375"
    Valley Plate IncludedYes
    Pulley IncludedNo
    GTIN Code847087044882
    Sold in QuantityEach