SFI Flexplate GM 168T 1 Piece Rear Main

The SFI Flexplate GM 168T 1 Piece Rear Main is a purpose-built flexplate engineered for serious engine builders and high-performance Small Block Chevy applications. This component bridges your engine's crankshaft to the torque converter in automatic transmissions, absorbing shock loads and dampening drivetrain harmonics that would otherwise compromise reliability. Whether you're building a street cruiser, weekend racer, or restomod, a quality flexplate is non-negotiable when upgrading from stock iron to a balanced rotating assembly or modern transmission setup.

This single-piece steel flexplate features 168 teeth designed to work seamlessly with matching starter systems and is internally balanced to complement balanced or neutral-balance crankshaft configurations. The SFI 29.1 certification ensures it meets rigorous safety standards for high-RPM operation and extreme duty cycles, critical when running boost, nitrous, or heavily modified engines. The one-piece rear main seal design simplifies installation, eliminates potential leak paths, and provides superior sealing integrity compared to two-piece designs—a detail that separates professional builds from amateur mistakes.

This flexplate is ideal for Small Block Chevy engines in street rods, muscle cars, and dedicated performance vehicles where automatic transmission compatibility is required. Weighing 6.91 pounds, it integrates directly with internally balanced or neutral-balance rotating assemblies and pairs with your existing torque converter and transmission bell housing. Proper installation requires alignment with the crankshaft centerline and correct torque specifications to the mounting bolts—always consult your engine builder's documentation and use a torque wrench to prevent premature failure or vibration issues during high-load acceleration.