SFI Flexplate GM LSA Engine

The TCI SFI Flexplate GM LSA Engine (part number 399756) is designed specifically for high-performance LSA engine swaps and restorations where reliability and safety are paramount. This flexplate is essential for those installing a supercharged LSA into classic cars, custom hot rods, or high-horsepower street machines, serving as the critical interface between the engine and transmission.

Constructed to absorb torque spikes and isolate drivetrain shock, this flexplate is engineered to meet SFI certification standards, ensuring it can withstand the rigors of racing and extreme-duty applications. Unlike rigid flywheels, flexplates can flex and dampen vibrations, protecting both the transmission and engine block from potential failures under high torque loads.

Ideal for engine builders, performance shops, and enthusiasts, this component is compatible with the GM LSA engine platform and is suitable for both manual and automatic transmissions. With a weight of 9.8 lbs and a diameter of 14.4 inches, it balances strength and rotational inertia, making it a reliable choice for both street and competition applications.