LS Head Bolt Kit Michigan Motorsports Alloy Steel

Description

Product Overview

The LS Head Bolt Kit from Michigan Motorsports is engineered to replace the original head bolts on 1997‑2003 LS engines. Crafted from high‑grade alloy steel (Grade 3), each hex head bolt features a right‑hand thread and a torque‑to‑yield design that meets or exceeds OEM tensile strength. The kit includes all required bolts for both cylinder heads, ensuring a complete, hassle‑free installation. Specifications include M15x1.5, M10x1.5, and M5x1.5 thread sizes, a 4‑pound package weight, and dimensions of 9.5 x 6.5 x 2 inches.

Usage

Designed for both daily drivers and high‑performance builds, this bolt set is ideal for engine rebuilds, head swaps, and performance upgrades on 4.8L, 5.3L, 5.7L, and 6.0L LS variants such as LS1, LS6, LQ4, LQ9, LM7, and LR4. Professional mechanics and DIY enthusiasts will appreciate the direct‑fit design that eliminates the need to source individual bolts, reducing labor time and ensuring consistent torque application across the head.

Why Choose Us

Michigan Motorsports combines decades of automotive expertise with rigorous quality control. Each bolt undergoes heat treatment to achieve Grade 3 hardness, guaranteeing long‑term durability under extreme combustion pressures. Our kits are backed by a 4.6‑star rating from 68 verified customers, reflecting reliability and satisfaction. With a best‑seller rank in the automotive replacement head bolt sets, you can trust the performance and fit of our product.

Key Features

• OEM‑grade alloy steel construction for maximum strength
• Complete 2‑head set includes all torque‑to‑yield bolts
• Fits a wide range of LS engines from 4.8L to 6.0L
• Right‑hand thread, hex head design for easy installation
• Meets or exceeds factory torque and tensile specifications

FAQ

Does this kit fit LS1 engines?

Yes, the kit is compatible with LS1 as well as LS6, LQ4, LQ9, LM7, and LR4 engine families.

Are the bolts reusable after removal?

Torque‑to‑yield bolts are designed for one‑time use to maintain proper clamping force; we recommend replacing them with a new set for each rebuild.

What tools are needed for installation?

A standard hex socket set and a torque wrench calibrated to the manufacturer’s specifications are sufficient for installing the bolts.

Is this kit covered by a warranty?

Yes, Michigan Motorsports offers a limited warranty against material defects for one year from the date of purchase.

Can I use this kit for performance upgrades?

Absolutely. The high‑strength alloy steel construction provides the clamping force required for both stock and high‑performance applications.