Flexplate - LS Engine to 4L80 Trans

The Chevrolet Performance Flexplate for LS Engine to 4L80 Transmission is a precision-engineered flexplate purpose-built to couple modern LS-series engine platforms to the proven 4L80E transmission. This 168-tooth steel flexplate delivers the mechanical interface required for reliable power transfer in LS-to-4L80 drivetrain conversions, making it essential for engine swap projects that demand OEM-quality integration.

Built from steel with internal balance specifications, this flexplate is engineered to match the rotating mass characteristics of both the LS engine block and 4L80E transmission bell housing. The internal balance design ensures minimal vibration and smooth engagement under load. At 6.2 pounds, the component reflects the substantial construction necessary to handle the torque output of contemporary LS platforms. Installation requires a spacer, a detail that accommodates the specific bolt-hole geometry and timing requirements unique to this transmission/engine pairing.

LS-engine conversions remain popular in classic car restoration, street rod fabrication, and performance rebuild projects where builders prioritize reliability and parts availability over OEM sourcing constraints. The 4L80E transmission—a four-speed automatic with lock-up converter capability—pairs naturally with LS powerplants across a wide range of vehicle platforms. This flexplate bridges that combination with specifications verified against GM Performance engineering standards, eliminating guesswork in drivetrain compatibility.

Sourcing the correct flexplate is non-negotiable in engine swap work—mismatched flexplates cause converter runout, transmission bearing damage, and drivetrain noise. This Chevrolet Performance part number (19260102) carries manufacturer validation, reducing the risk of clearance or fitment surprises common with aftermarket alternatives or salvage components.