GM LSX SFI HD Flexplate 168 Tooth

The GM LSX SFI HD Flexplate 168 Tooth by Meziere is a heavy-duty flexplate engineered for high-performance LSX engine swaps and restorations. This component serves as the critical interface between your engine and transmission, designed specifically for builders who demand reliability in forced-induction, turbocharged, and supercharged applications. Whether you're converting a classic muscle car, building a dedicated drag platform, or upgrading an existing LSX installation, this flexplate eliminates guesswork and delivers the durability required for sustained high horsepower output.

The 168-tooth design accommodates modern electronic fuel injection and ignition systems that rely on accurate crankshaft position sensing through the flexplate's teeth pattern. Meziere's SFI-certified construction ensures this flexplate meets sanctioning body standards for drag racing and competition use, critical for anyone running organized events or requiring certified components. The heavy-duty engineering means thicker material and superior metallurgy compared to stock flexplates, resisting the harmonics and shock loads inherent to high-boost applications. At 10.2 pounds, this component balances structural integrity with the mass minimization required for enthusiast builds targeting performance optimization.

This flexplate is ideal for LSX engine builders, transmission shops, and restorers working with GM performance platforms or modern engine transplants into classic vehicles. Installation requires basic mechanical competency—the flexplate bolts directly to the LSX crankshaft flange and mates with standard torque converter applications. Compatibility spans both automatic and select manual transmission adapters, making it versatile across diverse build configurations. Proper installation with factory-spec torque values and thread-locking compound ensures years of reliable service, even under sustained boost and competition duty.