Billet Flexplate GM LS 168 Tooth Flat H.D.

The Billet Flexplate GM LS 168 Tooth Flat H.D. from Meziere is engineered for LS engine builders and street/strip enthusiasts who demand absolute reliability in high-horsepower applications. A flexplate serves as the critical link between your engine's crankshaft and automatic transmission, and choosing a premium billet unit over cast-iron OEM components is essential when pushing beyond stock power levels. This heavy-duty design addresses the limitations of factory flexplates, which can develop cracks under aggressive throttle cycles, high-RPM operation, and extreme torque loads typical of modified LS powerplants.

Constructed from billet aluminum, this 168-tooth flexplate offers superior strength and rigidity compared to stamped or cast alternatives, with a weight of 10.15 lbs that keeps rotating mass minimal without sacrificing durability. The flat profile design ensures compatibility with modern torque converter setups and maintains precise balance characteristics critical for smooth operation at all RPM ranges. The 168-tooth configuration is the standard for most LS engines paired with common 4L60E, 4L80E, and newer 10L80E transmissions, while the billet construction resists fatigue cracking and deformation even under repeated high-boost or nitrous oxide applications where cast iron would inevitably fail.

This flexplate is ideal for LS swap projects, turbocharged builds, supercharged engines, and any combination where horsepower output exceeds approximately 500 hp and torque delivery demands premium component integrity. Installation requires engine removal or partial disassembly to access the crankshaft nose, making this a job best paired with other internal work or transmission service. Verify your specific LS variant—such as LS1, LS2, LS3, LS7, or LSX—and confirm torque converter bolt pattern compatibility with your transmission before purchase, as the 168-tooth standard covers the vast majority of street and racing LS combinations.