EngineQuest V8 Flywheel 168-Tooth 14" 305 350 | Internal Balance | 2-Piece Rear Main Seal | 5.0L / 5.7L | Gray Iron | 1968–1985 | 3991469

This 168-tooth, 14-inch flywheel is engineered for V8 5.0L and 5.7L engines using an internal balance setup with a 2-piece rear main seal, covering 1968–1985 applications. Built as an OEM-style replacement, it delivers reliable performance for engine rebuilds and drivetrain restorations. Manufactured from gray iron, this flywheel provides excellent structural strength and thermal stability under load. The hardened ring gear ensures consistent starter engagement, while the precision-machined friction surface (1.6/6.4 RA) supports smooth clutch operation and dependable power transfer. Designed to meet factory fit and function standards, it cross-references OEM 3991469, FW-100, Hollander 409-347B, and 555-601205, making it a solid choice for internal balance V8 applications requiring durability and accuracy. 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 Internal Balance Flywheel – Designed for V8 engines using an internal balance configuration with 2-piece rear main seal.
• 14-Inch Diameter OEM-Style Design – Ensures proper starter engagement and clutch alignment.
• Gray Iron Construction – Manufactured from durable gray iron for strength, heat stability, and long service life.
• Hardened Ring Gear – Improves starter durability and reduces wear during repeated starts.
• Direct Replacement Application – Fits 1968–1985 V8 5.0L and 5.7L engines; replaces OEM 3991469.
• 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.