SB Chevy Flex Plate

The B and M AUTOMOTIVE SB Chevy Flex Plate is a purpose-built transmission adapter designed for small block Chevrolet engines paired with automatic transmissions. This 168-tooth flexplate transfers power from the engine crankshaft to the torque converter while accommodating external balance weight configurations, making it an essential upgrade for custom engine builds and transmission swaps that demand reliability and precise fitment.

Constructed from steel and engineered to SFI 29.1 specifications, this flexplate meets safety standards critical for high-performance applications where rotating assembly integrity cannot be compromised. The 168-tooth design is the standard specification for small block Chevy configurations, while external balance capability ensures compatibility with balanced crankshaft and damper systems. At 7.3 pounds, the component integrates seamlessly into engine packages without unnecessary weight penalty, and the precision-machined bore guarantees proper alignment with both the crankshaft flange and torque converter hub.

Builders and enthusiasts performing small block Chevy automatic transmission installations rely on this flexplate when original equipment has worn teeth, when converting from manual to automatic operation, or when assembling stroker and modified engines. The SFI 29.1 certification signals that this component has undergone impact testing and material verification—a meaningful safeguard in builds where transmission failure carries high risk. Whether supporting a stock replacement, a performance upgrade, or a complete engine swap, this B and M AUTOMOTIVE flexplate delivers the durability and precision fitment required for dependable operation.