Flexplate 139-Tooth SFI Chevy V8 Int. Balance

The Flexplate 139-Tooth SFI Chevy V8 Internal Balance by J-W Performance is designed for serious small-block or big-block Chevy engine builds that utilize automatic transmissions. This SFI-certified flexplate replaces the factory unit and acts as a crucial coupling between the engine's crankshaft and torque converter, transferring power while managing vibration and torsional stress.

The flexplate features a 139-tooth configuration that aligns with the standard ring gear on most Chevy V8 engines, ensuring reliable starter engagement. Its internal balance design means the rotating assembly has been precisely counterweighted during machining, which can help reduce the need for external balance weights. This design aims to enhance engine performance by minimizing vibration transmitted to the chassis and drivetrain.

Engine builders and mechanics trust J-W Performance components for their precision and durability in demanding applications. This flexplate is compatible with any internally balanced Chevy V8 paired with an automatic transmission, making it a versatile choice for various builds.