{"product_id":"suncoast-a1-bfp-4-billet-flex-plate-17-gm-6-6l-duramax-l5p","title":"SunCoast A1-BFP-4 Billet Flex Plate | 2017-2019 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax L5P","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReplaces weak factory cast iron and stamped steel\u003c\/li\u003e\n\u003cli\u003eOne-piece billet steel design for superior strength\u003c\/li\u003e\n\u003cli\u003eHandles high torque from Duramax L5P engines\u003c\/li\u003e\n\u003cli\u003ePrevents cracking and center failure of stock plates\u003c\/li\u003e\n\u003cli\u003eImproves durability with aftermarket torque converters\u003c\/li\u003e\n\u003cli\u003eDirect bolt-in replacement with no modifications needed\u003c\/li\u003e\n\u003cli\u003eTransfers torque reliably from crankshaft to transmission\u003c\/li\u003e\n\u003cli\u003eIdeal upgrade for tuned and heavy-duty applications\u003c\/li\u003e\n\u003cli\u003eBuilt to withstand extreme towing and hauling loads\u003c\/li\u003e\n\u003cli\u003eDesigned and manufactured in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eKeep Your Duramax Power From Going To Waste\u003c\/h4\u003e\n\u003cp\u003eWhen 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.\u003c\/p\u003e\n\u003ch4\u003eA Stronger Link Between Crankshaft And Transmission\u003c\/h4\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fits: \u003c\/strong\u003e 2017, 2018, 2019 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax L5P\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for 2017-2019 GM Silverado and Sierra 2500HD\/3500HD with 6.6L Duramax L5P.\u003c\/li\u003e\n\u003cli\u003eReplaces weak factory cast iron and stamped steel flex plate.\u003c\/li\u003e\n\u003cli\u003eStock flex plates are prone to cracking under high torque.\u003c\/li\u003e\n\u003cli\u003eEssential upgrade when running aftermarket torque converters.\u003c\/li\u003e\n\u003cli\u003eDirect bolt-in replacement with no modifications required.\u003c\/li\u003e\n\u003cli\u003eIdeal for tuned trucks, heavy towing, and high load use.\u003c\/li\u003e\n\u003cli\u003eImproves drivetrain reliability by preventing common OEM failures.\u003c\/li\u003e\n\u003cli\u003eTransfers torque more effectively between engine and transmission.\u003c\/li\u003e\n\u003cli\u003eRecommended for trucks producing higher than stock power levels.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is suggested for proper fitment and safety.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SunCoast Performance","offers":[{"title":"Default Title","offer_id":68060757590289,"sku":"SUN-A1-BFP-4","price":509.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/0477\/1089\/files\/Screenshot_2025-09-17_114923.png?v=1794723812","url":"https:\/\/gautoparts.com\/products\/suncoast-a1-bfp-4-billet-flex-plate-17-gm-6-6l-duramax-l5p","provider":"Guaranteed Auto Parts","version":"1.0","type":"link"}