Collection: ARP Harmonic Balancer Bolt

ARP Harmonic Balancer Bolts - High-Strength 200,000 PSI

Premium high-strength harmonic balancer bolts engineered to securely fasten the harmonic balancer to the crankshaft. ARP bolts feature 200,000 PSI tensile strength, 12-point heads, and wide area washers to withstand extreme clamping forces and absorb torsional vibrations in performance and race engines.

Key Features:

• 200,000 PSI tensile strength for maximum clamping force
• 12-point head design for precise torque application
• Wide area washer distributes clamping load evenly
• High-strength chromoly steel construction
• Black oxide finish for corrosion resistance
• Precision threads for accurate torque values
• Designed to prevent harmonic balancer slippage

Common Applications:

• LS engine builds (LS1, LS2, LS3, LS6, LS7, LSX)
• Small block Chevy performance engines
• Big block Chevy high-performance builds
• Ford small block and big block engines
• Holden V8 253 and 308 engines
• Race engines with high RPM operation
• Supercharged and turbocharged applications

Why Upgrade to ARP Balancer Bolts?

Stock harmonic balancer bolts are designed for factory torque specifications and standard operating conditions. Performance engines with increased RPM, forced induction, or aggressive camshafts generate significantly higher torsional forces that can cause stock bolts to stretch or fail, leading to harmonic balancer slippage or separation. ARP harmonic balancer bolts provide 200,000 PSI tensile strength to withstand extreme clamping forces, while the 12-point head design allows for precise torque application and the wide area washer distributes load evenly to prevent damage.

Technical Advantages:

• 200,000 PSI tensile strength prevents bolt stretch and failure
• 12-point head provides better grip and torque accuracy
• Wide area washer prevents balancer hub damage
• Chromoly steel construction for superior strength
• Precision rolled threads for consistent torque values
• Black oxide finish resists corrosion
• Prevents harmonic balancer slippage at high RPM

Installation Guidelines:

• Clean crankshaft snout and balancer bore thoroughly
• Apply ARP Ultra-Torque assembly lubricant to threads and washer
• Torque to ARP specifications (typically 110-120 ft-lbs for most applications)
• Use 12-point socket for proper engagement
• Verify balancer alignment before final torque
• Re-torque after initial heat cycle if specified

Engine Compatibility:

• LS Engines: LS1, LS2, LS3, LS6, LS7, LSX, L92, L99 for Holden Commodore and custom swaps
• Small Block Chevy: 262, 265, 267, 283, 302, 305, 307, 327, 350, 400
• Big Block Chevy: 396, 402, 427, 454, 502
• Ford: Small block Windsor, Cleveland, and big block applications
• Holden V8: 253, 308 engines

Performance Benefits:

• Prevents harmonic balancer slippage and failure
• Withstands high RPM and forced induction stress
• Maintains proper crankshaft damping
• Eliminates risk of balancer separation
• Provides peace of mind in demanding applications
• Essential for race engines and high-performance builds

Critical upgrade for performance and race engines requiring reliable harmonic balancer retention. Australian stock with fast dispatch from Perth, Western Australia.