What specific Edelbrock cylinder heads is this bolt kit compatible with?

This Edelbrock #8556 head bolt kit is designed for use with Edelbrock cylinder heads part numbers #60575, 60579, 60595, 60599, 61515, 61519, 61525, 61529, 60509, 60569, 60587, and 60589, provided they were manufactured before March 15, 2002.

Can I use this bolt kit with original factory Pontiac cylinder heads?

No, this Edelbrock #8556 head bolt kit is not designed for use with stock original Pontiac cylinder heads. It is specifically intended for use with the listed Edelbrock cylinder head part numbers.

What does the 170,000 psi rating mean for these bolts?

The 170,000 psi rating indicates the tensile strength of the bolts. This high rating means the bolts are very strong and can withstand significant clamping forces, which is important for sealing the cylinder heads under high engine operating pressures.

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Specifications

Brand: Edelbrock
Part #: 8556
UPC: 85347085569

Edelbrock Pontiac Head Bolt Kit

Name: Edelbrock Pontiac Head Bolt Kit
Brand: Edelbrock
SKU: edelbrock-edelbrock-pontiac-head-bolt-kit-t14-126996
Price: 191.64 USD
Availability: BackOrder

$191.64

On Backorder

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Edelbrock Pontiac Head Bolt Kit for 1965-1979 Pontiac 326-455 V8 engines. Cold-formed bolts ensure molecular integrity for reliable cylinder head sealing.

Key Features

Fits 1965-1979 Pontiac 326-455 V8 engines.
Cold-formed for molecular integrity and heat-treated prior to machining.
Rated at 170,000 psi for strong clamping force.
Reduced diameter bolt heads can allow for re-torquing without valve train removal.
Includes hardened and parallel-ground washers for even clamping.
Manufactured by ARP.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

Edelbrock is well-known for performance engine parts, and their head bolt kits are built to handle the demands of performance engines. This #8556 kit is specifically for Pontiac V8 engines from 1961 to 1979, covering displacements from 326 to 455 cubic inches. It's designed to work with specific Edelbrock cylinder heads, so be sure to check the fitment details for your application. These bolts are a solid choice for rebuilding or upgrading your Pontiac's top end.

These bolts are cold-formed to maintain molecular integrity and then heat-treated before machining. This process helps ensure they can withstand the pressures and temperatures found in performance Pontiac engines. They are rated at 170,000 psi, giving you confidence in their strength. A practical detail is the reduced diameter bolt heads, which often allow you to re-torque the cylinder heads without removing the valve train components, making the job easier. Hardened and parallel-ground washers are included to ensure even clamping force across the cylinder head surface.

This kit fits a wide range of Pontiac models from the mid-60s through the late 70s, including popular choices like the Firebird, GTO, and Grand Prix. If you're working on a classic Pontiac engine and need reliable head fasteners, this Edelbrock kit is a well-built option.