Fidanza 55-59 MG MGA Lightweight Flywheel with Replaceable Friction Plate

When you're rebuilding the drivetrain on your 1963-1967 MG MGB, a lighter flywheel can make a noticeable difference. This Fidanza flywheel is designed to reduce rotational mass, which means your engine can rev up faster and more freely. That translates to quicker acceleration and a more responsive feel when you get on the gas.

The body of this flywheel is made from billet 6061 T6 or 2024 T4 aluminum, making it significantly lighter than the stock unit – typically 40-60% less weight. This lower moment of inertia (MOI) helps the engine respond more quickly to throttle inputs. For long-term reliability and performance, it features a heat-treated friction plate for optimal grip and a hardened 1050 steel ring gear that can be replaced if needed. Fidanza also uses military-spec fasteners to ensure everything stays securely in place.

This flywheel is designed as a direct replacement, meaning it fits right onto your MGB's existing drivetrain components. The replaceable friction plate is a smart feature, allowing you to service the friction surface without replacing the entire flywheel, which can save you time and money down the road.