Flexplate CM Steel SFI GM LS Series 1997-Up

The Flexplate CM Steel SFI GM LS Series 1997-Up from PRW Industries is a precision-engineered flexplate designed for high-performance LS-series engine swaps and builds. Built for serious enthusiasts and professional engine builders, this 168-tooth chromoly flexplate serves as the critical intermediary between your rebuilt or modified LS engine and automatic transmission, absorbing torsional vibration while maintaining the rigidity needed for forced-induction applications and aggressive launch scenarios. Whether you're restoring a classic with modern LS power or maximizing output in a dedicated performance platform, this component is engineered to handle the demands of modified engines without compromising reliability.

Constructed from chromoly steel and internally balanced, the Flexplate CM Steel SFI GM LS Series incorporates a one-piece seal design that eliminates potential leak points common in multi-piece assemblies. The SFI 29.1 certification ensures this component meets Society of Automotive Engineers safety standards for high-RPM and high-boost applications, making it ideal for turbocharged, supercharged, and nitrous-equipped builds. The 168-tooth configuration is standard for LS-series engines, ensuring proper starter engagement and reliable cold starts across all RPM ranges. At 6.85 lbs, the optimized weight maintains rotational inertia characteristics appropriate for modern engine management while delivering the structural integrity required in demanding drivetrains.

This flexplate is engineered for any builder planning LS-engine integration from 1997 and up, accommodating the full range of LS variants (LS1, LS2, LS3, LS7, LSA, LT-series compatibility through proper adapter selection). Installation requires basic engine-bay familiarity and standard automotive hand tools; the one-piece seal design simplifies assembly and reduces the risk of installation errors that plague traditional two-piece designs. Pair this component with quality torque converter and transmission work for optimal driveline performance and longevity in street, strip, or road-course applications.