Search  for anything...

Michigan Motorsports LS Head Bolt Kit | Fits 2004-2013 GM LS Engines | 4.8L 5.3L 6.0L 6.2L 7.0L LS2 LS3 LS7 LQ4 LQ9 LC9 LY6 LM7 | Stock Replacement Cylinder Head Bolt Set

  • Based on 63 reviews
Condition: New
Checking for the best price...

Buy Now, Pay Later


As low as $11.66 / mo
  • – 6-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Monday, Jul 27
Order within 17 hours and 15 minutes
Available payment plans shown during checkout

Protection Plan Protect Your Purchase
Checking for protection plans...

Size: Bolts for 2 Heads


Features

  • Complete Head Bolt Kit Includes all required torque-to-yield bolts for fastening both cylinder heads, saving you time and ensuring proper fitment during engine rebuilds or top-end upgrades.
  • OEM-Quality Replacement Manufactured to meet or exceed factory tensile strength and torque specifications, providing dependable clamping force under extreme conditions.
  • Built for Stock or Performance Builds Designed for everything from street-driven rebuilds to high-compression or boosted LS performance applications.
  • 20042013 LS Engine Coverage Specifically designed for later-style LS blocks with equal-length head bolts, ensuring proper compatibility with updated GM designs.
  • Wide LS Engine Fitment Fits 4.8L, 5.3L, 6.0L, 6.2L, and 7.0L LS engines, including LS2, LS3, LS7, LQ4, LQ9, LY6, LC9, L99, and LM7.

Material: Alloy Steel


Exterior Finish: Machined


Manufacturer Grade: Grade 2


Head Style: Flat


Fastener Type: Hexagon Bolt


Exterior Finish: Machined


Manufacturer Grade: Grade 2


Screw Head Style: Flat


Fastener Type: Hexagon Bolt


Thread Type: Unc


Thread Style: Right Hand


Item Hardness: Grade 2


Head Type: Flat


Material Type: Alloy Steel


Metal Type: Alloy Steel


Size Name: Bolts for 2 Heads


Number of Pieces: 30


Item Dimensions: 9.5 x 6 x 2 inches


Brand: Michigan Motorsports


Manufacturer: Michigan Motorsports


Number Of Items: 1


Model: K7100


Part Number: AJ251


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Jul 27

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Perfect
Size: Bolts for 2 Heads
Used these on a very mild built 5.3 and haven’t had any problems with them. Seemed to be very good quality and would definitely buy again if I build another Ls. Price was pretty decent as well, worth the money for sure
Reviewed in the United States on January 19, 2026 by Matt

  • 5.3 head bolts! A must change on any rebuilds! 5.3 head bolts! A must change on any rebuilds!
Size: Bolts for 2 Heads
Functionality, quality, best value for money, easy to install, and fits like factory! I’m an amateur LS rebuilder with 6 motors rebuild I’ve always have used Michigan motor sports!
Reviewed in the United States on July 6, 2025 Reviewed in the United States on July 6, 2025 by Joe franco

  • they work
Size: Bolts for 2 Heads
correct
Reviewed in the United States on February 14, 2024 by Rustynut

  • They worked on my 2007 avalanche
Size: Bolts for 2 Heads
Works real great with AFM lifters style heads
Reviewed in the United States on July 2, 2023 by Miguel Garcia

  • Excelente
Size: Bolts for 2 Heads
Bueno
Reviewed in the United States on August 30, 2022 by Maria Carolina Navarro

  • Didn't work
Size: Bolts for 2 Heads
Didn't work as described for my 6.0l ls motor.
Reviewed in the United States on April 13, 2026 by HighCountry

  • Oem fit Oem fit
Size: Bolts for 2 Heads
It's what I needed. Zero issue. Michigan's customer support is fast and quick to respond.
Reviewed in the United States on July 2, 2022 Reviewed in the United States on July 2, 2022 by Kevin cossey

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...