SFI Flexplate GM LS1

The TCI SFI Flexplate for GM LS1 engines is a precision-engineered component designed for LS-swap builds, high-performance restorations, and serious engine modifications where reliability and safety are non-negotiable. This flexplate serves as the critical connection between your LS1 engine and transmission, absorbing harmonic vibrations while transmitting torque to the driveline.

Whether you're building a street machine, race car, or undertaking a modern LS conversion into a classic chassis, this SFI-certified component ensures your drivetrain meets sanctioning body standards and factory OEM performance expectations. SFI (Society of Automotive Engineers International) certification means this flexplate has been rigorously tested and engineered to contain catastrophic failure—a critical safety feature in high-RPM or forced-induction applications where standard components can fail unpredictably.

TCI's flexplate incorporates precision-balanced construction to minimize vibration and driveline harmonics that would otherwise compromise drivetrain integrity and component lifespan. The compact 14.3-inch diameter fits the tight envelope of LS1 installations while the 1.2-inch profile maintains proper spacing in tight engine bays, making it an ideal solution for both modern LS performance builds and retrofit applications where factory dimensions matter.