Flexplate Xtreme Duty GM LS 168-Tooth SFI

The Flexplate Xtreme Duty GM LS 168-Tooth SFI from PRW Industries is purpose-built for serious LS engine swaps and high-performance builds where reliability under load is non-negotiable. If you're upgrading a Gen III, Gen IV, or Gen V LS powerplant with an automatic transmission, this component is your foundation for smooth power delivery and engine longevity.

The 168-tooth configuration matches OEM LS specifications, ensuring seamless compatibility with modern transmission controllers and torque converters while maintaining the precision required in street, strip, and racing applications. Flexplates are the often-overlooked bridge between your crankshaft and torque converter; they flex under load to absorb drivetrain shock and protect internal engine components from sudden inertia spikes. PRW's Xtreme Duty design uses premium nodular iron casting and optimized geometry to handle the torsional stress of supercharged, turbocharged, and naturally aspirated LS engines without flex-cracking or tooth shearing. The SFI certification means this flexplate meets Society of Automotive Engineers safety standards for drag racing and high-horsepower applications—a critical requirement if you're stepping up power output beyond stock levels.

At 8.08 lbs, it's engineered with balanced mass properties to minimize harmonics while maximizing durability. Builders tackling LS engine conversions into S10 pickups, Camaros, Corvettes, or custom chassis will find this flexplate essential for vehicles equipped with compatible transmissions like the 4L60E, 4L80E, and 6L90E.