Mr. Gasket Ultra Seal Harmonic Balancer Bolt & Washer Kit

The Mr. Gasket Ultra Seal Harmonic Balancer Bolt and Washer Kits deliver a complete, professional-grade hardware solution for secure harmonic balancer installation. Each kit is engineered to keep the harmonic balancer properly fastened under the extreme stress, vibration, and thermal cycling demands of high-performance, street, and racing applications.

Key Features:

• Grade 8 alloy steel bolt construction provides superior tensile strength and durability for critical high-stress fastening applications
• Tall hex head design helps prevent socket slippage during installation and torque application for a clean, confident install
• Extra-thick parallel ground washer promotes accurate and uniform torque distribution across the contact surface for consistent clamping force
• Split lock washer resists loosening caused by engine vibration and repeated thermal expansion and contraction cycles
• Heat-treated construction ensures long-term reliability in high-stress rotating assembly applications
• Complete hardware kits include all necessary components for a proper, professional installation
• Legal for use on emissions-controlled, non-emissions-controlled, and racing-only vehicles

Mr. Gasket has been a trusted name in engine performance and sealing technology for over 50 years. Now part of the Holley Performance family, Mr. Gasket continues to deliver fasteners and hardware that meet or exceed OEM specifications — giving builders and enthusiasts confidence that critical rotating assembly hardware is up to the task. These kits are well-suited for original equipment replacement, high-performance street, drag race, and circle track applications.

Available in multiple configurations to fit a wide range of domestic V8 and performance engines — select the correct kit for your application from the options below.