Exedy EF503A Clutch Flywheel

EXEDY Lightweight Racing Flywheel for Mustang

EXEDY EF503A is a lightweight racing flywheel built for 1996-2016 Ford Mustang applications with a 6-bolt pattern. It uses one-piece billet chromoly steel construction to reduce rotating mass while maintaining the thermal capacity needed for street use and motorsport driving.

The EXEDY Lightweight Racing Flywheel line focuses on low weight and low inertia for quicker engine response. For Ford Mustang owners building a drag racing, autocross, rally, or spirited street setup, EF503A provides a direct-performance flywheel option with a 16.1 lb. design.

Key Features

• Part number EF503A
• Fits 1996-2016 Ford Mustang, N/A
• 6-bolt fitment for confirmed Mustang applications
• One-piece billet chromoly steel construction
• 16.1 lb. lightweight racing flywheel design
• Built for low inertia and improved engine response
• Suitable for drag racing, autocross, rally, and street use

Product Details

EXEDY EF503A is engineered as a sport flywheel for Ford Mustang builds that need faster rev changes without giving up the durability expected from a performance drivetrain component. The lightweight design reduces rotational mass, which can improve throttle response and help the engine climb and drop rpm more quickly. This part number, EF503A, is part of EXEDY’s Lightweight Racing Flywheel line and is intended for light to moderately tuned vehicles.

Compatible With 1996-2016 Ford Mustang, N/A. This part cross-references no listed interchange numbers in the provided data.

Common Issues It May Address

• Slow engine rev-up during acceleration
• Heavy rotating mass in performance clutch setups
• Reduced response in drag racing or autocross launches
• Need for a stronger billet flywheel construction
• Upgrade planning for a Ford Mustang performance drivetrain

Installation Notes and Tips

Verify 6-bolt crankshaft compatibility before installation. Confirm clutch, starter, and transmission setup match the vehicle’s existing performance configuration, and follow the service manual for torque specifications and flywheel inspection procedures. Because this is a performance flywheel, proper balancing and professional installation are recommended for best results.

Quality Assurance

EXEDY manufactures this flywheel as a one-piece billet chromoly steel performance component for racing and street applications. The lightweight racing design is built to balance reduced inertia with thermal capacity for demanding use.