Project LBMC

Stage 4: Transmission

Published in the April 2009 Issue April 2009 Build

Flex Plate

We are shooting for around 500 rwhp and more than 1,000 lb. ft. of torque from this truck before we're done with it, so the OEM flex plate should be replaced. It's not uncommon for a stock flex plate to crack or shatter under the added torque and abuse of a modified engine. The BD FleX-Plate is made to handle up to 1,500 lb. ft. of torque. BD uses forged steel in order to get uniform molecule alignment in the metal. (fig. 11) The BD flex plate is treated with black oxide coating for longevity, rather than zinc plating. Zinc plating causes metal to become brittle over time due to a condition known as hydrogen embrittlement. By the way, head studs are also treated with black oxide for the same reason. This flex plate is balanced to the German standard G5.6, which is two levels higher than the balance of the OEM flex plate. BD's FleX-Plate also passed the new SFI 29.3 certification test, which is difficult to do. These guys have done their homework.

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