Edelbrock Head Bolt Kit

1993–2004 Jeep Grand Cherokee / 1994–2006 Jeep Wrangler 4.0L Inline Six Engine

8533

Overview:

The Edelbrock Head Bolt Kit #8533 is a premium-quality fastener set designed specifically for Jeep 4.0L Inline Six engines, covering popular models such as the Jeep Grand Cherokee (1993–2004) and Jeep Wrangler (1994–2006). This comprehensive kit includes all the necessary head bolts and hardened washers engineered to provide reliable, long-lasting clamping force for cylinder heads. Ideal for enthusiasts and professional mechanics alike, the kit ensures proper sealing and durability during engine rebuilds or upgrades.

Manufactured by ARP and cold-formed for molecular integrity, these bolts are heat-treated and precision-machined to meet stringent performance standards. The reduced diameter bolt heads allow for cylinder head re-torqueing without the need to remove valve train components, simplifying maintenance and saving valuable time.

Key Features:

Designed to deliver superior strength and ease of installation, the Edelbrock Head Bolt Kit offers the following key features:

• Complete set of high-quality head bolts and hardened washers
• Cold-formed bolts for enhanced molecular integrity and strength
• Heat-treated prior to thread rolling and machining for durability
• Reduced diameter bolt heads eliminate valve train removal during re-torqueing
• Hardened, parallel-ground washers included for consistent clamping force
• Bolts rated at 170,000 psi tensile strength for maximum reliability
• Specifically engineered for 1/2" head bolts used with Edelbrock cylinder heads #50159 and #50169
• Fits a wide range of Jeep models equipped with the 4.0L Inline Six engine

Construction & Design:

The Edelbrock Head Bolt Kit is crafted using premium-grade materials and advanced manufacturing processes. Each bolt is cold-formed to preserve molecular structure, then heat-treated to achieve optimal hardness and tensile strength. The thread rolling and machining processes ensure precise thread geometry for secure fastening and easy installation.

Additionally, the kit includes hardened washers that are parallel-ground to provide uniform load distribution and prevent bolt loosening under extreme operating conditions. The reduced diameter bolt heads are a thoughtful design feature that allows mechanics to perform cylinder head re-torqueing without disassembling the valve train, enhancing serviceability.

Installation & Fitment:

This head bolt kit is engineered for direct fitment on Jeep 4.0L Inline Six engines from 1993 to 2004 Grand Cherokee models and 1994 to 2006 Wrangler models. It is compatible with Edelbrock cylinder heads #50159 and #50169 and also fits certain AMC/Jeep 4.2L Inline Six engines from 1972 to 1990 when used with Edelbrock heads.

Installation requires standard mechanical tools and basic engine assembly knowledge. The bolts’ design facilitates straightforward installation and future maintenance, especially when re-torqueing cylinder heads after initial assembly or during routine engine servicing.

What's Included:

• Complete set of Edelbrock head bolts (1/2" diameter)
• Hardened, parallel-ground washers

Ideal For:

This kit is perfect for Jeep owners, mechanics, and performance enthusiasts who are rebuilding or upgrading the cylinder heads on their 4.0L Inline Six engines. Whether restoring a classic Jeep Cherokee, maintaining a reliable Grand Cherokee, or enhancing a Wrangler’s performance, the Edelbrock Head Bolt Kit provides the strength and reliability needed for long-lasting engine durability.

Edelbrock is one of the most recognized names in American performance, building hardware for horsepower-minded street and race builds. From intake manifolds and carburetors to EFI and supporting engine components, Edelbrock’s lineup is designed to improve airflow, throttle response, and overall engine performance for classic and modern platforms alike.