ARP Engine Valve Cover Bolt Kit

Why ARP Engine Valve Cover Bolt Kits Stand Apart

When it comes to keeping an engine's valve covers sealed and secure, the fasteners doing the job matter far more than most builders initially realize. ARP (Automotive Racing Products) has built its reputation over decades on engineering fasteners that meet the demands of professional engine builders and weekend enthusiasts alike — and their Engine Valve Cover Bolt Kits are a prime example of that commitment to precision.

To ensure proper sealing of valve covers, ARP manufactures a variety of special application-specific bolt and stud kits. Many professional engine builders prefer to use studs because of their ability to properly position the gasket and guide the cover into position. This kind of thoughtful, application-driven engineering is what separates ARP hardware from generic replacement fasteners.

Material and Finish Options

ARP valve cover bolt kits are offered in a choice of chromoly steel with a black oxide finish or corrosion-proof polished stainless steel. You also have a choice between hex head and easy-access 12-point designs. The black oxide chromoly option is a popular choice for purpose-built race engines where a stealthy under-hood look is preferred, while the polished stainless finish is a favorite in show-quality builds and restorations.

Crafted from premium polished stainless steel, these bolts resist rust, corrosion, and discoloration even under extreme heat, making them ideal for performance and restoration builds alike.

Head Design and Load Distribution

ARP offers two head configurations to suit different engine bay access challenges. The compact 12-point head design allows easy access in tight areas while delivering uniform torque and clamp load across the valve cover flange. For builds where access is less constrained, conventional hex head designs are also available. The nuts feature a wide base for better load distribution and sealing, while the compact head is easily accessed. Stud kits come complete with nuts and washers, while bolt kits are shipped with the required flat washers.

Application Coverage — From LS to Hemi

ARP's valve cover bolt kit lineup spans a broad range of popular performance platforms. Designed for Chevrolet LS Series engines, one high-strength kit features black oxide 12-point bolts with precision-machined threads for consistent torque and reliable performance. For Mopar enthusiasts, ARP's 12-Point Black Oxide Valve Cover Bolt Kit secures Chrysler Hemi 5.7L or 6.1L engine valve covers, engineered from 8740 steel for exceptional strength and durability in high-performance and street engines.

For builders working with taller aftermarket valve covers, ARP also offers a kit engineered for Chevy Gen III/IV LS small-block engines that includes stainless steel hex bolts paired with a 0.750" spacer, ideal for taller valve covers or custom engine modifications, made from polished ARP stainless steel for superior corrosion resistance and long-lasting durability.

Precision Machining You Can Feel at the Socket

Each bolt is precision-machined to maintain consistent torque and prevent stripping, while included washers ensure even load distribution. Included washers help evenly distribute the load across the valve cover flange, preventing leaks and reducing the risk of distortion. These are the kinds of details — materials, geometry, surface treatment, and complete kit contents — that define ARP's approach to even the seemingly modest task of bolting down a valve cover.

Whether you're refreshing a daily driver, assembling a dedicated track car, or completing a show-quality restoration, browse the full selection of Engine Valve Cover Bolt Kits or explore everything ARP has to offer across their complete fastener lineup.