Extreme Duty Flexplate SFI GM LS1/LS2/LS6 168T

The Extreme Duty Flexplate SFI GM LS1/LS2/LS6 168T is engineered for serious LS engine builds where reliability and performance cannot be compromised. Whether you're converting a classic muscle car, building a street rod, or preparing a high-output performance engine, a quality flexplate is critical to engine longevity and drivability. This PRW Industries component transfers power from your crankshaft to the torque converter while accommodating thermal expansion and vibration—making flexplate selection as important as choosing the right transmission itself.

Built to SFI certification standards, the Extreme Duty Flexplate accommodates the 168-tooth ring gear required for LS1, LS2, and LS6 engine families, ensuring proper starter engagement and reliable cold-start torque delivery. PRW Industries designs this flexplate with extreme-duty construction to withstand high rpm operation, aggressive launches, and elevated torque loads—ideal for forced-induction builds, nitrous applications, and high-horsepower naturally aspirated configurations. The forged and heat-treated construction resists cracking and fatigue failure, while precision manufacturing ensures true runout and balanced operation that minimizes vibration at the converter and drivetrain interface.

Performance enthusiasts and professional builders rely on this flexplate for LS engine swaps into Chevrolet, Pontiac, and Oldsmobile platforms, as well as custom builds in foreign chassis and vintage vehicles. Installation is straightforward—it bolts directly to the LS crankshaft flange in place of the factory unit—though alignment with your torque converter and transmission should be verified during assembly. Weighing 7.41 lbs, the flexplate is a precision component that demands attention during engine teardown and rebuild; PRW's extreme-duty engineering ensures it performs reliably across the full rpm range and power band of your LS engine.