Product Summary

L20, L76, LC9, LH6, LH8, LMG, LS2, LY2, LY5, LY6

    Key Specs

    MFG. Part #54-701-11
    BrandCOMP Cams

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    Perfect choice for strong idle lope and great power in 4.8 & 5.3L truck engines. No Springs Required (NSR) version of popular Thumpr lobe designs. AFM & VVT delete.

    • For Stage 1 Thumpr Cam for GEN IV LS 4.8/5.3/6.0L Trucks
    • Camshaft Series: Thumpr NSR (No Springs Required)
    • Cam Type: Hydraulic Roller
    • Basic Operating RPM Range: 1,800-6,400
    • Intake Duration at .050 Inch Lift: 222
    • Exhaust Duration at .050 inch Lift: 233
    • Advertised Intake Duration: 276
    • Advertised Exhaust Duration: 295
    • Lobe Separation: 112
    • Intake Valve Lift: 0.541
    • Exhaust Valve Lift: 0.536
    • Lifters Included: No
    • Valve Springs Required: No
    • Assembly Lubricant Included: No
    • Camshaft Gear Attachment: 3-Bolt
    • Camshaft Material: Billet Steel

    CARB Warning

    For race/ off road use only

    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. 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 #54-701-11
    BrandCOMP Cams
    Camshaft TypeHydraulic Roller Tappet
    RPM Range1600-6400
    Intake Duration276
    Exhaust Duration295
    Intake Duration (.050" Lift)222
    Exhaust Duration (.050" Lift)233
    Intake Valve Lift w/ Rocker Arm Ratio0.541"
    Exhaust Valve Lift w/ Rocker Arm Ratio0.536"
    Lobe Separation112 °
    Material TypeBillet Steel
    Computer Controlled CompatibleYes
    GTIN Code00036584386414
    Valve Springs RequiredNo
    Gear Attachment3-Bolt
    Sold in QuantityEach
    NotesFor use with stock valve springs and stock torque converter.