JEGS 601098 Heavy-Duty Flexplate for use with Mopar/Jeep 5.7L & 6.1L Modular Hemi internally-balanced engines is engineered to handle extreme-duty applications and designed to take the punishment of today’s high-horsepower engines. This Hemi Flexplate is designed to work with Chrysler 904 & 727 torqueflite automatic transmissions and is perfect for engine swaps. The Flexplate is .035 in. thicker than stock and has a 29.1 SFI approval stamped into the face of the plate.