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Free shipping over $100 · USA & Canada
Free shipping over $100 · USA & Canada
Head Bolt Kit - 1999–2003 4.8L-6.2L Chevrolet Gen III LS (12-Point) XP988

Head Bolt Kit

4.8L–6.2L Chevrolet Gen III LS · 12-Point

1999–2003 applications

PART # XP988

$151.99 - $151.99
$151.99
$151.99 - $151.99
$151.99
Availability:
in stock, ready to be shipped
Free shipping is available on orders over $100 shipping to the USA or Canada.
ULTRA STRENGTH

In comparison to standard bolts, our alloy's material characteristics enable much higher tensile strength. For the best fatigue strength, threads are rolled after thermal treatment. A high-quality coating can improve corrosion resistance, reduce friction, and improve overall performance.

EASY INSTALLATION
Installation manual is included with drawn diagrams to ease the installation process. Our head bolts are designed to retain cylinder seal even with today's extremely high-pressure turbo systems. 

PREMIUM QUALITY
Black oxide finish protects from wear and tear. Hardened parallel washers allow for uniform load distribution and accurate torque readings.

Your application

The right fit comes first.

Browse the compatible applications below, or check your exact vehicle before adding this product to your cart.

Check my vehicle
Head Bolt Kit - 1999–2003 4.8L-6.2L Chevrolet Gen III LS (12-Point)

Inside the box

Know exactly what arrives.

Included components for this product.

QtyComponent
30 12-point head bolts
11 mm primary and 8 mm secondary bolts.
30 Hardened parallel washers
2 Sockets
1 Fastener assembly lubricant

Engineering details

Small details. A secure assembly.

The bolt head bears on a hardened washer while the threaded end engages the engine block. Tightening the bolt creates the clamping load that holds the cylinder head and gasket against the block.

How head bolts secure the cylinder head An integral bolt head bears on a washer above the cylinder head. The bolt passes through the head and gasket and engages threads in the engine block. Blue arrows show clamping force. Bolt head Washer Cylinder head Head gasket Engine block Block threads
Simplified cross-section. Bolt style and proportions vary by kit.

XOTIC 7200 alloy.

Alloy steel head bolts with a black oxide finish, paired with hardened parallel washers.

Threads rolled after treatment.

The bolt threads are rolled after thermal treatment as part of the manufacturing process.

A matched seating surface.

Hardened parallel washers sit beneath the bolt heads and distribute load across the seating surfaces. Use the supplied assembly lubricant with the correct procedure for your kit.

Before you begin

A good install starts here.

Review the instructions and any application-specific requirements before you begin.

Download installation manual

Before you order

Will this kit fit my engine?

For the listed 1999–2003 Chevrolet Gen III LS 4.8L–6.2L applications. Confirm the exact engine, cylinder heads and original bolt configuration before ordering.

Does this kit use bolts or studs?

This kit uses head bolts with integral heads and hardened parallel washers. Separate studs and retaining nuts are not included.

Where can I find the installation procedure?

Use the linked installation manual for the lubrication instructions, tightening stages and sequence for this kit.

How does the warranty work?

Review the warranty policy for coverage, eligibility, and claim requirements.

Read warranty termsRegister your warranty
California Proposition 65 warning

WARNING: Cancer and Reproductive Harm. www.P65Warnings.ca.gov

From our customers

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Overall Judge.me rating

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