4.8-6.2L Chevy Gen III/LS Series Small Block Main Stud Kit

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Vehicle Fitments

Fits 1997 - Current Chevrolet Gen III/LS 4.8L 5.3L 5.7L 6.0L 6.2L; LS1 LS2 LS3 LS4 LS6 LQ4 LQ9 LY6 L92 L99 engines


Package Contents

20x Main Studs

10x M8 Side Bolts 

30x Nuts

1x Allen Wrench

2x Sockets

1x Fastener Assembly Lubricant


Why Main Studs? 

Main studs are required for maximum loading & reduced wear and tear on the block threads. They assist with main cap alignment, and there is less of a change of main cap walking because the studs remain stationary during cap clamping. These main studs gar exceed clamping forces provided by standard head bolts.



XOTIC 7200 material properties allow for far greater tensile strength compared to 8740 Chromoly steel head studs. Threads are rolled after heat treatment for optimum fatigue strength. Premium quality inspection standards ensure you'll never get a blow head gasket again.



Broached stud ends install & make cylinder head removal easier. Engineered to unleash more performance out of your vehicle. Ample clamping strength prevents cylinder heads from lifting. 



Head studs are designed to retain cylinder seal even with today's extremely high-pressure turbo systems. These studs far exceed clamping forces provided by standard head bolts.



20x Main Studs, 10x M8 Side Bolts, 30x Nuts, 2x Sockets, 1x Allen wrench, and 1x Fastener Assembly Lubricant included. Black oxide finish protects from wear and tear. Hardened parallel washers allow for uniform load distribution and accurate torque readings. 




All details including torque recommendations are included in the manual for your reference. 


    Customer Reviews

    Based on 5 reviews
    Irwin, Brad (Toronto, CA)

    Chevy Gen III/LS Series Small Block Main Stud Kit 4.8L 5.3L 5.7L 6.0L 6.2L MS334

    dylan mcree (Wasilla, US)
    Armature engine builder

    On my first ever full build, on a LM7 block. I haven’t installed yet but the packaging is great, and the shipping is just perfect. I live in alaska and getting free shipping and quick delivery is always an A in my book. Price is good as i try to keep on a decent budget these were just great for the money. Just certain fasteners i have noticed to be very important, these being one of them and i don’t mind spending money for it, I think you’re getting better stuff then ARP to be honest.

    Earl Bigelow (Laval, CA)

    Chevy Gen III/LS Series Small Block Main Stud Kit 4.8L 5.3L 5.7L 6.0L 6.2L MS334

    Excellent studs

    I have Xotic studs in my diesel and LS engines, no issues with any of them! Love the product, although they will aggravate the hell out of you until you review the product.

    B Crow (Monticello, US)
    Best money spent

    I've been building engines now for 15 years. Mostly bbc marine engines. This is my first ls build and my first with any xotic products. I can tell u now this is for sure won't be my last. I have used. CHeap speedmaster and arp products and these are by far the best products on the market.

    Frequently Asked Questions


    Do you have any certificate/tensile strength exam that can attest to the tensile strength you advertise?

    Yes, please click on the following link for a tensile strength report by Atrona Labs. We test our head studs extensively to ensure premium quality standards. The video demonstrated in this short preview highlights one of many spot inspections performed for our head studs. 


    Why choose Xotic Performance head studs over other main studs?

    The answer is simple - our long-term vision is to provide premium performance products at an affordable price any car enthusiast can afford. We understand we're a relatively new company, but that doesn't change the quality of products you receive. Our head studs have been put to the test by the thousands, and we can assure you you're getting quality for an affordable price. 


    Do you offer military discounts?

    We do offer military discounts. 

    Please fill out the following form: https://www.xotic-performance.com/pages/military-discount


    Do these main studs come with paperwork? 

    Detailed instructions are included as part of the kit. 


    Does the kit include an assembly lube?

    Yes. Assembly lubricant is included as part of the kit. 


    What is the tensile strength?

    220,000-240,000 PSI. 


    What material are they made of? 

    XOTIC 7200 head studs are made from premium steel alloys that allow for far greater tensile strength compared to 8740 Chromoly steel head studs.


    Do these come with instructions/torque sequence for replacing 1 at a time with the heads on?

    This kit includes instructions with torque specifications and sequence.