Mechanics and DIY engine builders, this Evergreen Piston Set is exactly what you need for rebuilding that 4.7L V8 SOHC engine. These are 0.50mm oversize pistons (which is about 0.020 inches), perfect for when your cylinders need to be bored out due to wear or damage. The set includes everything you need - premium grade aluminum silicon pistons with gas nitrited steel rings that offer 50% longer life than standard rings. The improved design features more efficient oil passage holes in the oil ring groove, which helps prevent gummed up oil and reduces the risk of fractures and cracks that can lead to engine failure. These pistons meet or exceed OEM specifications and are built to easily last 150,000+ miles with proper installation and maintenance. The fitment covers a wide range of vehicles including Jeep Grand Cherokee and Commander, Dodge Dakota, Durango and Ram 1500, Chrysler Aspen, and Mitsubishi Raider from around 1999-2007 with the 4.7L V8 SOHC engine. The reduced ring tension not only provides better fuel economy but also reduces cylinder wear over time. If you're doing a complete engine rebuild or just replacing worn pistons, this set gives you quality components that will restore your engine's performance and reliability. The workmanship is solid, and the specifications are precise for proper fit and function. Definitely a smart choice for anyone serious about doing the job right the first time.