Tilton Engineering 66-003HG 7.25" OT-II Triple Disc Metallic Clutch Assembly

The Tilton Engineering 66-003HG is a high-performance 7.25" OT-II triple-disc metallic racing clutch assembly designed for step-type flywheels. Engineered primarily for road racing, circle track, open wheel, and formula racing applications, this clutch offers the low moment-of-inertia, high torque capacity, and reliability necessary for the most demanding motorsports competition.

Key Features:

• 7.25" (184mm) diameter triple-disc configuration for maximum torque capacity
• High ratio pressure plate capable of 840 ft-lbs torque capacity
• Open one-piece clutch cover design provides lower operating temperature, high strength, and minimal deflection
• Chrome vanadium diaphragm spring with engineered pressure plate geometry for high clamp load-to-wear ratio
• Step-type flywheel design with .100" height difference between friction disc and clutch cover legs
• Weight: 9.9 lbs (4.5 kg) with moment of inertia of 87.6 lb-in²
• Includes pressure plate, clutch cover, diaphragm spring, and floater plates
• Hardened steel thrust buttons provide smooth, durable operation
• Dynamically balanced for highest level of performance

Important Notes:

• This is a clutch assembly LESS DISCS - clutch disc packs sold separately
• Designed for step-type flywheels only (not compatible with pot-type flywheels)
• Not recommended for street use - racing applications only
• Sintered metallic discs (when purchased separately) are not designed to withstand excessive slippage or modulation

Tilton's OT-II metallic clutches have been the standard in professional motorsports since 1972, offering championship-proven performance for road racing, circle track, and formula applications. The triple-disc design maximizes torque capacity while maintaining low rotating mass for quick shifting and reduced drivetrain inertia.