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Speedmaster Main Stud Kit GM LS, LS1, LS2, LS6, LS7, LSX, GEN III


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Speedmaster PCE287.1024
More than 10 available
Main Stud Kit
  • GM LS, LS1, LS2, LS6, LS7, LSX, GEN III
  • 4-Bolt Style
  • 190,000 psi
  • Includes 12-Point Nuts, Washers
  • Ships

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    PCE287.1024 is rated 2.7 out of 5 by 3.
    Rated 4 out of 5 by from Good enuff Not quite ARP quality, but they're very highly rated steel bolts (8740 chromoly steel). These most definitely will be an upgrade over the torque-to-yield cheaper steel bolts GM uses stock. I can't find a torque spec for the life of me, and contacting the company was worthless (no response after days). ARP's 200,000 PSI bolts are rated for 80lbs/ft for the main cap torque spec. I imagine that would work well for these bolts as well. That's what I'm going to use. I have a forged rotating assembly in my LS6, and I'm going to rev it out to 7k rpm redline for circuit racing. I'll write back here if I have any problems.
    Date published: 2018-04-12
    Rated 3 out of 5 by from Speedmaster ls2 head studs Seem to be a decent product. The only issue ive had with the speed master brand. They dont include a instruction manual with any kind of torque specs.
    Date published: 2016-03-19
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    Do these come with different lengths to fit the windage tray??

    Asked by: Jones1987
    No, you will need to check the length depending on the windage tray being used.
    Answered by: Rusty B
    Date published: 2018-11-28

    This kit does not include any kind of installation directions, where can I obtain the reccomended torque specs and installation directions

    Asked by: City garage
    PRELOAD (TORQUE) RECOMMENDATIONS Following the manufacturers recommended torque sequence tighten the nuts and bolts in three equal steps to the specifications listed below Inner studs - 4.770 long 60 ft lbs -M8 side bolts 20 ft lbs (use RTV sealant under the head of bolt) Outer studs - 4.550 long 50 ft lbs
    Answered by: SteveM
    Date published: 2019-12-28
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    Some parts are not legal for use in California or other states with similar laws / regulations

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    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.