Team Hellcat

ARP 12-Point Harmonic Balancer Bolt Kit – Fits All 289, 302, and 351 Windsor Engines

Running an engine without a proper harmonic dampener is like stepping into the ring with a pro boxer who isn’t wearing gloves. The harmonic dampener protects your engine by absorbing massive amounts of kinetic energy as the crankshaft flexes and twists. To ensure your dampener stays securely in place, the ARP 150-2501 12-Point Harmonic Balancer Bolt Kit delivers extreme clamping force for your 289, 302, or 351 Windsor engine.

Built to Last:

• Crafted from 8740 chromoly steel for exceptional strength and durability
• Finished with a black oxide coating for corrosion resistance
• Bolts rated at 190,000 PSI provide maximum clamping force
• Comes with a 1/4” thick wide-area washer and an extra-tall 12-point head that accepts deep sockets and prevents stripping

Features & Benefits:

• Premium-grade, high-performance bolts
• Includes flat washers
• Made in America
• Easy to install

Specifications:

• Thread Size: 5/8”-5/18”
• Underhead Length: 2.050”
• Head Style: 12-point
• Washer Included: Yes
• Fastener Yield Strength: 190,000 PSI
• Material: 8740 chromoly
• Finish: Black oxide

Applications:

• 1965-1995 Mustang
• 1966-1977 Bronco
• 1973-1979 F100

Your engine relies on a network of nuts, bolts, and screws to handle incredible forces. If hardware fails or you’re upgrading for more performance, ARP delivers the most trusted fasteners in motorsports, including Formula 1, IndyCar, NHRA, and NASCAR.

Installation Notes:

Follow the manufacturer’s torque sequence and tighten nuts to ARP’s recommended torque using ARP Ultra-Torque Fastener Assembly Lubricant

Tech Tip: Avoid motor oil or low-quality lubricants. ARP Ultra-Torque ensures consistent clamping force and reduces friction on studs

California Residents: Proposition 65 Warning