Exedy FF501A Lightweight Flywheel for 2004-19 Subaru WRX/STI/Impreza/Legacy

Vehicle Fitment

• 2004-2014 Subaru Impreza WRX STI (2.5L H4, 6-Speed Manual)
• 2004-2005 Subaru Impreza WRX/RS/Outback/TS (2.5L H4, 6-Speed Manual)
• 2006-2011 Subaru Impreza WRX/WRX Limited (2.5L H4, 5/6-Speed Manual)
• 2007-2009 Subaru Legacy (2.5L H4, 6-Speed Manual)
• 2015-2016 Subaru WRX (2.5L H4, 6-Speed Manual)
• 2015-2019 Subaru WRX STI (2.5L H4, 6-Speed Manual)

Features

• Lightweight performance flywheel engineered to reduce rotational mass
• One-piece billet chromoly steel construction for strength and durability
• Low-inertia design improves throttle response and acceleration
• High thermal capacity helps the clutch operate cooler under load
• Integrated ring gear for reliable starter engagement and long service life
• Airflow-optimized design enhances cooling around clutch assembly
• SFI certified for motorsport reliability and high RPM durability
• Direct replacement for compatible factory flywheels without modification

Specifications

• Part number: FF501A
• Flywheel type: Lightweight performance flywheel
• Material: One-piece billet chromoly steel
• Weight: Approximately 13.3 lbs (reduced vs factory)
• Mounting: 8-bolt crank flange
• Certification: SFI 1.1 approved for competition
• Transmission: Manual

Included Components

• 1x Exedy FF501A lightweight flywheel

Product Description

The Exedy FF501A Lightweight Flywheel is a high-performance replacement flywheel designed for select Subaru WRX, WRX STI, Impreza, and Legacy models with 2.5L H4 engines and manual transmissions. Engineered from one-piece billet chromoly steel, this flywheel reduces rotational mass compared with factory units while maintaining high thermal capacity to keep clutch temperatures down during spirited driving, autocross, rally, drag, or track use.

By reducing inertia, the FF501A allows the engine to rev more quickly and enhances throttle response and acceleration without compromising durability. The integrated ring gear ensures reliable starter engagement, and its solid construction eliminates potential issues with pressed-on ring gears. SFI certification means this flywheel meets stringent safety and performance standards for competitive use. This lightweight flywheel provides a dependable and responsive drivetrain enhancement for performance Subaru builds.