The 4955160 set of 6 piston kits in standard size is designed to fit Cummins 4BT, 4.5, and QSB 4-cylinder engines. Here are some key details about this piston kit: Compatibility: The piston kit is specifically designed to fit Cummins 4BT, 4.5, and QSB engines. These engines are commonly used in various applications such as industrial machinery, commercial vehicles, and marine equipment. Quantity: The set includes 6 piston kits, each comprising a piston, piston rings, piston pin, and retaining clips. The quantity is suitable for overhauling all pistons in a 4-cylinder engine. Standard Size: The piston kit comes in standard size, which means it is manufactured to the original equipment manufacturer (OEM) specifications for the engine. Standard size pistons are designed to fit the engine block without the need for machining or resizing. Quality Construction: The pistons in the kit are precision-engineered and constructed from high-quality materials to withstand the rigors of combustion and high engine temperatures. They are designed to provide optimal performance and durability under normal operating conditions. Function: Pistons play a crucial role in the internal combustion process of the engine. They move up and down within the cylinder bore, compressing the air-fuel mixture and transmitting energy to the crankshaft. Proper sealing of the combustion chamber is essential for efficient engine operation. Piston Rings: The piston rings included in the kit create a seal between the piston and the cylinder wall, preventing the leakage of combustion gases and ensuring efficient engine performance. Piston Pin: The piston pin, also known as the wrist pin, connects the piston to the connecting rod and allows for rotational movement as the piston reciprocates within the cylinder. Professional Installation: Installing piston kits requires technical expertise and precision. It involves disassembling the engine, removing the old pistons, cleaning the cylinder bores, and installing the new pistons with proper ring and pin orientation. Engine Overhaul: Piston kits are commonly used during engine overhauls or rebuilds to restore engine performance and address issues such as worn piston rings, damaged pistons, or excessive cylinder wear. Here are the compatible model and type of Cummins equipment: Compatible with Cummins CPL(s): 1700, 1701, 2743, 8725, 8754, 8755, 8756, 41100, 41472, 41700, 41701, 41703, 42743, 43172, 44195 Compatible with Case Skid Steer Loader(s): 4000V, V400 Compatible with Case Compactor(s): SV212, SV216 Compatible with Hyundai Wheel Loader(s): HL730-9S Compatible with Antec Asphalt Paver(s): PW5000 Compatible with Dynapac Compactor(s): CA250 Compatible with Komatsu Wheel Loader(s): WA200-6, WA200PZ-6 Compatible with Ammann Compactor(s): ASC110D, ASC110HD, ASC130D, ASC130HD, ASC150HD, ASC150D In summary, the 4955160 set of 6 piston kits in standard size is a vital component for maintaining and restoring the performance of Cummins 4-cylinder engines. It offers reliability, durability, and compatibility with OEM specifications, ensuring optimal engine operation and longevity. Note: You will be receiving the following items: 6 QSB Standard Size Pistons 6 Piston Rings 6 Piston Pins 2 Piston Clips per piston