V8 Flywheel 14.125" Diameter | 6.6 400 168 Tooth | Cast Iron | Internal Balance | Manual Transmission | 1971–1980 | 3986394

This 14.125-inch V8 flywheel is engineered for 1971–1980 manual transmission applications, serving as an OEM-style replacement for engines requiring casting number 3986394. Designed to meet factory specifications, it provides reliable performance for engine rebuilds and drivetrain service. Manufactured from gray cast iron, this flywheel delivers excellent structural integrity and heat resistance under demanding operating conditions. The hardened ring gear ensures consistent starter engagement, while the precision-machined clutch surface supports smooth power transfer and dependable drivability. Built for internal balance V8 configurations, this flywheel cross-references FW-100, Hollander 409-347B, and V2003, making it a solid solution for restoration and replacement needs where correct diameter, balance, and durability are critical. Engine Quest produces high-quality OE-style replacement parts. Each part undergoes rigorous testing and inspections to meet EngineQuest’s exact specifications. Designed for precision manufacturing and durability, our products ensure easy installation. With nearly 500 SKUs available, the company specializes in hard-to-find, in-demand parts, including those no longer available from the OEM, difficult to salvage, or with prohibitively high OEM costs.

• 168-Tooth V8 Flywheel – Designed for V8 engines requiring a 14.125-inch diameter flywheel with internal balance configuration.
• OEM-Style Replacement – Direct replacement for OEM casting 3986394, ensuring correct fit and function.
• Cast Iron Construction – Manufactured from gray cast iron for durability, strength, and thermal stability.
• Hardened Ring Gear – Improves starter engagement and long-term wear resistance.
• Manual Transmission Application – Precision-machined friction surface with 1.6/6.4 RA finish for smooth clutch operation.
• EngineQuest – Over 75 Years of U.S. Automotive Expertise – Designed in the USA with Top-Quality Control. Proud IMCA/WISSOTA Supporter. Backed by a 1-Year Parts & Labor Warranty.