This Duramax billet flex plate (A1 - BFP - 2) is a game - changer for 2006 - 2010 GM 2500HD models with LBZ & LMM 6.6L Duramax engines. It replaces the factory flywheel/flex plate with an improved one - piece billet steel design. Say goodbye to heavy cast iron and weak stamped steel flex plates! This flex plate is a must - have when dealing with high torque and a well - designed torque converter that transfers torque without slip. The torque from the engine is smoothly transferred through the flex plate to the torque converter and then to the transmission input shaft. With increased engine torque, a stock flex plate can crack or rip, but this billet flex plate offers better durability. Part Number: A1 - BFP - 2. Notes: SFI certified flywheel flex plates are required for drag racing vehicles running 11.99 and quicker in the 1/4 mile, 7.49 and quicker in the 1/8 mile, or any vehicle exceeding 135 mph. In 2008, the SFI specification for diesel automatic transmission flex plates changed from 29.1 to 29.3, which prohibits stamped metal materials. To meet the SFI 29.3 spec, replace the flex plate every three years.

How to use: First, bolt the flex plate to the crankshaft. Then, bolt the torque converter to the flex plate. That's it! The power from your engine will then be smoothly transferred to the transmission. Notes: If you're into drag racing and your vehicle runs 11.99 seconds or quicker in the 1/4 mile, 7.49 seconds or quicker in the 1/8 mile, or exceeds 135 mph, you need an SFI - certified flywheel flex plate. Also, be aware that in 2008, the rules for diesel automatic transmission flex plates changed. The new SFI 29.3 specification doesn't allow stamped metal. Maintenance: To keep your flex plate up to the SFI 29.3 standard, make sure to replace it every three years. This will ensure the best performance and safety of your vehicle.