Earl's Performance Racing Head Bolt Sets - Chromemoly Engine Fasteners

Earl's Performance Racing Head Bolt Sets are the go-to upgrade for serious engine builders and racers who demand professional-grade clamping reliability. Engineered to outperform single-use factory hardware, these chromemoly head bolt sets deliver consistent, repeatable sealing performance across high-performance street and racing applications — build after build.

Every set in the Earl's Racing Head Bolt line is constructed from premium 170,000 PSI chromemoly alloy steel, making them approximately 15% stronger than standard Grade 8 fasteners. That elevated yield strength translates directly into superior clamping force and resistance to the extreme thermal cycling and cylinder pressures found in performance and race engines.

A reduced wrenching size is engineered across the entire product line, providing valuable socket clearance around rocker arms and valvetrain components — making head installation and re-torquing significantly easier in tight engine bays. The wide flanged head design works in tandem with included extra-thick chromemoly washers to distribute clamping load evenly across the head gasket surface for consistent, reliable sealing.

Unlike OEM torque-to-yield bolts that must be discarded after every removal, Earl's head bolt sets are fully reusable — eliminating the recurring cost and hassle of replacing factory fasteners every time cylinder heads come off for maintenance, rebuilds, or performance upgrades.

Product Line Features:

• 170,000 PSI chromemoly alloy steel construction — approximately 15% stronger than Grade 8 fasteners
• Fully reusable — not torque-to-yield; engineered for repeated installation and removal
• Reduced wrenching size for improved socket clearance around rocker arms and valvetrain components
• Wide flanged head paired with extra-thick chromemoly washers for even clamping load distribution
• Available in hex head and 12-point head styles to suit different installation preferences and tooling
• Black oxide corrosion-resistant finish for lasting durability and professional appearance
• Sold as complete engine sets — includes matching chromemoly washers and anti-seize lubricant
• Made in the USA

Backed by Earl's Performance's decades of motorsport engineering heritage, these Racing Head Bolt Sets represent a straightforward, cost-effective upgrade over unreliable single-use factory hardware — delivering the clamping consistency and durability that performance engine builds demand.