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Thoroughbred Sku #: SUNA1-BFP
Manufacturer Sku #: A1-BFP
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LB7 and LLY Billet Flex PlateFits Duramax Years: 01-05This replaces the factory flywheel/flex plate with a improved billet one piece design, eliminates the heavy cast iron and the weak stamped steel flex plate. This is a must with the high torque in conjunction with a better designed torque converter that can transfer the torque with no slip. The flex plate is bolted to the crank shaft, then the converter is bolted to flex plate. The torque from your is transfered to the flex plate, from the flex plate to the torque converter then to your input shaft in the trans. With increased torque from the engine and no slip out of the converter it can crack and/or rip the center out of a stock flex plate.NOTE: A SFI certified flywheel flex plate is required on drag racing vehicles running 11.99 and quicker in the 1/4 mile and 7.49 and quicker in the 1/8 mile, or any vehicle exceeding 135 mph. It was changed in 2008 from the 29.1 SFI specification to the SFI specification 29.3 for automatic transmission flex plates for diesel applications. The new rules for the flex plate requires that the material can not be a stamped metal as many OEM and after market flex plates are. To maintain the SFI specification 29.3 requirements, the flex plate must be replaced every three years.
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