2001-2005 Duramax Billet Flex Plate (A1-BFP-1)

The SunCoast billet flex plate replaces the factory cast iron flywheel and weak stamped steel flex plate on 2001-2005 LB7 and LLY Duramax trucks with an improved one piece billet steel design. It is a must have alongside a better designed torque converter that can transfer torque with no slip.

The flex plate bolts to the crankshaft and the converter bolts to the flex plate, so engine torque passes from the flex plate to the converter and finally to the transmission input shaft. With increased torque from the engine, a stock flex plate can crack or rip its centre out.

Part Number: A1-BFP-1

• One piece billet steel construction
• Replaces the heavy cast iron flywheel and stamped steel flex plate
• Direct fit for 2001-2005 LB7 and LLY 6.6L Duramax
• Suited to high stall and high performance torque converters

• An 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 require that the material cannot be a stamped metal as are many OEM and aftermarket flex plates.
• To maintain the SFI specification 29.3 requirements, the flex plate must be replaced every three years.

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