SunCoast A1-BFP-4 Billet Flex Plate | 2017-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax L5P

Features:

• Replaces weak factory cast iron and stamped steel
• One-piece billet steel design for superior strength
• Handles high torque from Duramax L5P engines
• Prevents cracking and center failure of stock plates
• Improves durability with aftermarket torque converters
• Direct bolt-in replacement with no modifications needed
• Transfers torque reliably from crankshaft to transmission
• Ideal upgrade for tuned and heavy-duty applications
• Built to withstand extreme towing and hauling loads
• Designed and manufactured in the USA

Keep Your Duramax Power From Going To Waste

When you start adding power or push your truck hard with towing and hauling, the factory flex plate becomes one of the first weak points to give out. The SunCoast billet flex plate takes that worry off the table by replacing flimsy cast iron and stamped steel with a solid one-piece billet steel design. This upgrade means you can put your foot down with confidence, knowing the plate won’t crack under high torque loads. It is especially valuable if you are running an upgraded torque converter, where every ounce of torque is transferred without slip. Whether you are pulling heavy trailers, climbing steep grades, or simply demanding more from your Duramax, this flex plate is designed to hold up where the stock one fails. SunCoast built it for real-world conditions, so you get durability that matches the strength of your truck. Instead of wondering when the factory plate will let you down, you can keep working and driving with peace of mind.

A Stronger Link Between Crankshaft And Transmission

The SunCoast A1-BFP-4 Billet Flex Plate for 2017-2019 Silverado and Sierra 2500HD and 3500HD trucks with the 6.6L Duramax L5P was engineered to solve a well-known problem. The stock flex plate, made of cast iron and stamped steel, often cracks or tears out under the increased torque of modern diesel engines. By switching to a billet one-piece design, SunCoast eliminates these failure points while providing consistent strength across the entire plate. This design allows torque to transfer cleanly from the crankshaft to the torque converter, then into the transmission input shaft, without the risk of flex or failure. It also pairs perfectly with aftermarket torque converters, which put even more load on the connection. Installation is straightforward since it bolts directly in place of the OEM part with no modifications required. Built to withstand the stress of heavy towing, performance upgrades, and everyday demands, this flex plate is a critical upgrade for anyone who wants lasting reliability from their Duramax drivetrain.

Fits: 2017, 2018, 2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax L5P

Notes:

• Designed for 2017-2019 GM Silverado and Sierra 2500HD/3500HD with 6.6L Duramax L5P.
• Replaces weak factory cast iron and stamped steel flex plate.
• Stock flex plates are prone to cracking under high torque.
• Essential upgrade when running aftermarket torque converters.
• Direct bolt-in replacement with no modifications required.
• Ideal for tuned trucks, heavy towing, and high load use.
• Improves drivetrain reliability by preventing common OEM failures.
• Transfers torque more effectively between engine and transmission.
• Recommended for trucks producing higher than stock power levels.
• Professional installation is suggested for proper fitment and safety.