GM Performance Parts' LSX454 crate engine and the supercharged LSA crate engine each use a crankshaft with an eight-bolt rear hub that doesn't match the standard six-bolt pattern of conventional GM automatic transmission flexplates - including the popular Hydra-Matic 4L80-E.

Thomson Automotive has the solution with a flexplate kit that provides the perfect offset for use with the 4L80 and other transmissions. The kit features a factory GM eight-bolt flexplate and a custom-machined eight-bolt adapter hub, along with the necessary hardware - all for only $139.95.

The flexplate is also modified by Thomson Automotive to accommodate the bolt patterns of popular aftermarket torque converters. So, save yourself the time and hassle of trying to figure out which flexplate to use with your automatic transmission. This is a bolt-on, inexpensive solution that will have your LSX454- or LSA-powered project ready for the road quicker.