Billet Aluminum Flywheel - Externally Balanced For Gen 4, 5 & 6 Big Block Chevy 454 CID (Top Mount Starter)

External Balance Alum. Flywheel Gen 4,5, & 6 B/B Chevy (Top/Bellhousing Mounted Starter)

These all new billet aluminum flywheels are manufactured from certified billet material that will not break up under the stress and severe punishment of on and off throttle in high RPM marine environments.

By using a lighter aluminum flywheel, you will be rewarded with both faster acceleration and deceleration. Giving you the edge you’re looking for.

Billet construction

• Accepts Mercury couplers and heavy duty drive plates
• Multi-point ring gear attachment
• Light weight yet durable
• 33 Ounce (Gen 4) and 42.5 Ounce (Gen 5/6) Counterweight options
• Zero/neutral balance • 168 tooth gear
• Weight: 12lbs

NOTE: Big block Chevy's flywheel (or flexplate) counterweight balance changed significantly with the introduction of the Gen 5 and 6 engines around 1991 due to the switch to a one-piece rear main seal. This change increased the external balance offset from approximately 33.0 to 42.5 ounce-inches for the Gen 5/6 engines and even shifted to a different spec of 41.7 ounce-inches for some Gen 6 forged cranks.