SFI Flexplate GM LS Wide Converter Bolt Patt

The SFI Flexplate GM LS Wide Converter Bolt Pattern from TCI is an essential component for builders and enthusiasts converting traditional GM engines to LS architecture or upgrading transmission systems. This flexplate serves as the critical interface between your engine's crankshaft and torque converter, designed specifically for the wider bolt pattern found on modern LS engine families. Whether you're performing a complete LS swap, upgrading from a carbureted small-block to fuel injection, or installing an overdrive automatic transmission, this SFI-certified flexplate ensures proper power transfer while meeting safety standards required for high-performance applications.

Built to SFI Foundation specifications, this flexplate features precision engineering and robust construction to handle the demands of both street and competition use. The wide converter bolt pattern accommodates modern torque converters designed for LS engines, providing superior engagement and durability compared to adapter solutions. At 9.1 pounds, the component maintains a lightweight profile without sacrificing structural integrity—critical for minimizing rotational mass and improving engine response. The flexplate's design allows controlled flex during engagement, reducing shock loads on the transmission while maintaining reliable power delivery through the driveline. TCI's manufacturing standards ensure concentricity and balance, eliminating vibration issues that can develop from mismatched or substandard components.

This flexplate is ideal for mechanics and enthusiasts tackling LS conversions in classic vehicles, street rods, trucks, and performance cars requiring modern powertrain combinations. Installation requires proper alignment with your specific LS engine block and transmission bellhousing—precision that directly impacts longevity and smooth operation. The SFI certification provides confidence that the component meets stringent safety and performance requirements, making it suitable for both daily drivers and racing applications. Verify your engine's crankshaft bolt pattern and your transmission's converter mounting specifications before purchase to ensure perfect fitment and optimal performance.