Billet Flex Plate

Features:

• Fits 2011–2016 6.6L Duramax LML engines
• Replaces weak factory stamped steel flex plate
• One-piece billet construction for superior strength
• Eliminates heavy cast iron factory flywheel
• Handles increased torque without flex or failure
• Prevents cracking or center separation under load
• Essential for high horsepower or tuned engines
• Ideal when paired with upgraded torque converters
• Improves power transfer to the transmission
• Bolts directly to the crank and torque converter
• Supports slip-free torque transfer under pressure
• Designed and built for extreme diesel performance

Stop Flex Plate Failures Before They Start

When you're making serious torque with your 2011–2016 Duramax, the stock flex plate just doesn’t cut it. It might hold up under light loads, but once you start adding power and upgrading your torque converter, it quickly becomes a weak link. The SunCoast A1-BFP-3 Billet Flex Plate is a must-have if you want your drivetrain to stay together when the power hits. It replaces the flimsy stamped steel and bulky cast iron components with a solid one-piece billet design that can handle high torque without flexing, cracking, or warping. Whether you’re towing heavy, launching hard, or daily driving a tuned diesel, this flex plate gives you the confidence to push harder without worrying about failure. It bolts right to the crank and provides a reliable connection to the torque converter, so your power transfer stays smooth and strong. If you're already running a better converter, this is the flex plate that makes sure you get the most out of it.

Reinforced Billet Strength For High Torque Builds

The SunCoast A1-BFP-3 Billet Flex Plate is engineered specifically to solve the durability issues found in the stock flex plate used on 2011–2016 GM 2500HD and 3500HD Duramax LML trucks. The factory setup uses a combination of stamped steel and cast iron, which becomes a failure point when torque increases and converter slip is eliminated. This upgraded one-piece billet design is precision-machined to handle the added stress from high-output builds and performance torque converters. It mounts directly to the crankshaft and offers a secure connection point for the converter, ensuring maximum power transfer without distortion. One of the most common failure modes of stock plates is cracking or tearing around the center under load, especially in tuned or boosted applications. SunCoast eliminates that risk by using a solid billet core that distributes stress evenly and holds its shape under extreme conditions. If you're looking to build a reliable drivetrain foundation, this flex plate is a critical upgrade that pairs perfectly with high-stall or multi-disc converters.

Fitment: 2011, 2012, 2013, 2014, 2015, 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Notes:

• Fits 2011–2016 GM 2500HD/3500HD 6.6L Duramax LML
• Replaces factory cast iron and stamped steel flex plate
• One-piece billet design eliminates common failure points
• Designed for use with high torque and upgraded converters
• Stock flex plates can crack or tear under heavy load
• Recommended when running a triple disc or higher stall converter
• Improves durability and torque transfer consistency
• Ideal for high horsepower, tuned, or towing applications
• Bolts directly to crankshaft and torque converter
• Prevents center hub separation during aggressive use