Fel-Pro cylinder head bolt set for GM & Isuzu V6 — ES 72220, OEM-fit torque-yield hardware

Fel-Pro ES 72220 is a complete cylinder head bolt set engineered to restore correct clamping force and sealing integrity on specified GM and Isuzu V6 engines. Fel-Pro designs vehicle-specific sealing and hardware solutions to match or surpass original equipment standards. This bolt set is manufactured and specified to the same tolerances used by automakers, so it works with factory cylinder heads and gaskets to re-establish proper torque characteristics after disassembly. Choosing the correct head bolts helps prevent head gasket leaks, loss of compression, and uneven clamp loads when reassembling the top end of your engine.

What vehicles and engines does this bolt set fit?

This specific Fel-Pro ES 72220 package is matched to a range of GM and Isuzu models from the mid-2000s that used compatible V6 cylinder heads. Compatibility depends on the exact year, model, engine and trim—always confirm fitment for your VIN or build details before ordering.

• Fits select 2004–2006 Isuzu Ascender and 2004–2007 Buick Rainier models
• Includes fitment for 2008–2009 Buick LaCrosse/Allure variants where applicable
• Covers certain Cadillac Escalade ESV and similar GM platforms from 2004–2008
• Use vehicle selector tools or service records to verify exact compatibility

How does replacing cylinder head bolts help my repair?

Cylinder head bolts stretch and torque differently after being installed and heat cycled; replacing them restores predictable clamping forces necessary for a reliable head gasket seal. New bolts reduce the risk of post-repair leaks and help maintain engine compression and cooling system integrity.

• Provides fresh, calibrated fasteners with correct torque-yield characteristics
• Reduces chance of fastener failure from reuse-induced stretch
• Supports an even clamp load to protect head gaskets and mating surfaces
• Recommended anytime heads are removed for service or overhaul

What quality and specifications should I expect from Fel-Pro hardware?

Fel-Pro supplies engine sealing and related hardware designed to meet or exceed original equipment specifications. This set is produced from materials and heat treatments selected to match factory strength and durability expectations for the intended applications.

• Manufactured to OEM-equivalent dimensional and strength standards
• Engineered for application-specific fit and consistent torque behavior
• Works together with Fel-Pro gaskets and OEM parts for best results
• Packaged to include the complete set needed for the specified head(s)

How should I confirm fit and install these bolts correctly?

Before purchasing, verify compatibility using the vehicle fitment tool or by checking engine, year, model and trim. During installation, follow the vehicle manufacturer's torque and angle specifications; many modern head bolts require a specific sequence and an angle-tightening step.

• Check the "confirmed fit" or vehicle selector for your exact build
• Follow factory torque sequence and any specified angle-tightening steps
• Replace bolts as a full set; do not mix new and reused fasteners
• When in doubt, consult a repair manual or professional technician

Who is this for? This Fel-Pro ES 72220 head bolt set is intended for professional mechanics, restoration shops and knowledgeable DIYers performing engine head service on compatible GM and Isuzu models. It’s aimed at anyone rebuilding cylinder heads, replacing head gaskets or performing top-end repairs where factory-equivalent clamping performance and long-term reliability matter. If you need reliable, application-specific fasteners to match Fel-Pro gasket systems and restore correct torque behavior, this kit is an appropriate replacement option.

FAQ

Q: Can I reuse my original cylinder head bolts?

A: No—head bolts are typically torque-to-yield and should be replaced to ensure correct clamping and avoid failure.

Q: Does this set include bolts for both cylinder heads?

A: Yes—this kit provides the complete bolt set required for the specified engine head(s) in compatible vehicles.