Hays Performance Flywheels

Hays Performance Flywheels carry more than six decades of racing heritage into every product they make. Founded in 1958 by SEMA Hall of Famer Bill Hays, the brand earned its reputation on the starting lines of drag racing's biggest events and has been trusted by professional racers and serious enthusiasts ever since. Now part of the Holley Performance family, Hays continues to push the boundaries of flywheel engineering for street performance, drag racing, and road racing applications.

Every Hays flywheel is manufactured from certified billet material and precision CNC-machined to strict tolerances, ensuring structural integrity and optimal balance under the stress of high-RPM operation. The lineup spans both billet steel and billet aluminum constructions to meet the demands of a wide range of builds — from extreme-duty street machines to dedicated competition vehicles. Forged, heat-treated steel ring gears are standard across the line for long-term durability and consistent starter engagement.

Key Features:

• SFI-certified construction — meets the safety and compliance requirements for sanctioned racing classes
• CAD-engineered and precision CNC-machined to exacting tolerances for reliable balance and performance
• Available in internal, external, and neutral (zero) balanced configurations to match your engine's specific requirements
• Forged, heat-treated steel ring gears for superior durability and dependable starter engagement
• Manufactured from certified billet material for proven non-breakage under extreme high-RPM stress
• Broad application coverage spanning popular GM, Ford, and Mopar platforms
• Engineered for street performance, drag racing, and road racing demands

Whether you're upgrading a high-output street build or preparing a full competition vehicle, Hays Performance Flywheels deliver the precision engineering, proven materials, and race-tested durability that serious enthusiasts have relied on for generations. Select the correct variant for your specific engine and application from the options below.