FEL-PRO ES 72390 Head Bolt Set Pack of 2 - OEM Fit and Reliability

In this review the FEL-PRO ES 72390 Head Bolt Set (Pack of 2) is evaluated for professionals and DIY mechanics who need a reliable replacement for cylinder head bolts. The bottom line: this kit is for anyone replacing or re-torquing cylinder heads who wants an application specific, validated set that meets or exceeds original equipment specifications and avoids the risks associated with re-using torque-to-yield fasteners. The review focuses on fit, construction, and practical concerns encountered during installation.

Key Features

• Complete kit: Each pack contains a set of headbolts and hardened washers so users have the full complement needed for a single cylinder head service.
• OE equivalent: The bolts meet or exceed original equipment specifications which gives confidence in compatibility and long-term durability.
• Application specific design: Bolts are tailored for specific vehicle and cylinder head applications to ensure a correct fit without modification.
• Cold-formed and heat-treated: Manufacturing processes preserve molecular integrity and provide strength and consistent performance under engine loads.
• Reduced-diameter heads: Smaller bolt heads can eliminate the need to remove valvetrain components when re-torquing the cylinder head.
• Validated for fit, form and function: Each set is verified to fit the intended application, reducing guesswork at installation time.

Who It's For

This head bolt set is best for professional mechanics, restoration shops, and experienced DIYers working on engines that require a full replacement of cylinder head bolts or precise re-torquing. The kit is especially useful when avoiding reuse of T-T-Y fasteners is critical to engine integrity.

It may not be the ideal choice for first-time DIY installers who are uncomfortable with torque procedures or who require manufacturer-specific service guidance; some users reported mixed outcomes during installation so careful attention to torque specs and technique is important.

Pros & Cons

Pros

• Meets or exceeds OE specs, offering confidence in compatibility and longevity.
• Includes hardened washers and a complete set, removing the need to source additional parts.
• Manufactured cold-formed and heat-treated for consistent strength and reliability.
• Reduced-diameter heads simplify re-torquing without valvetrain removal in many applications.

Cons

• Some customers reported bolt breakage during installation, so correct torque technique and inspection are essential.
• Fit received mixed feedback for a few users, so verify application compatibility before installation.

Specifications

Product	CYLINDER HEAD BOLT SET
Quantity	Pack of 2 (per-pack set)
Manufacturer	FEL-PRO
Construction	Cold-formed and heat-treated with hardened washers
Design	Application specific, reduced-diameter bolt heads
Validation	Validated for fit, form and function
Specification	Meets or exceeds original equipment specifications

Our Verdict

The FEL-PRO ES 72390 Head Bolt Set is a sensible, value-oriented choice for users needing an OE-quality replacement kit that is validated for fit and function. It is recommended for experienced installers and professionals who will follow torque procedures carefully; when installed correctly it provides dependable performance and avoids the risks of re-using T-T-Y bolts.

Frequently Asked Questions

Are these bolts a direct replacement for OEM bolts?
Yes, the set is designed to meet or exceed original equipment specifications and is application specific for a direct fit.

Can I reuse my old torque-to-yield bolts with this kit?
No, the kit is intended to replace T-T-Y fasteners to avoid the risks associated with re-use; always follow service guidelines.

What should I watch for during installation?
Follow proper torque sequence and specification closely and inspect each bolt for signs of damage to reduce the chance of breakage reported by some users.