Description

Full Product Description The Cummins Steel Crown Piston M-7795 (Standard Size) is a heavy-duty piston assembly engineered for high-output diesel engines that operate under extreme combustion pressure and elevated temperatures. Designed as a direct replacement for OE piston numbers 5258754 and 5258755 , this piston delivers OEM-level durability, precise fitment, and long service life in Cummins diesel engines . Steel crown pistons are specifically used in modern diesel platforms to handle higher thermal loads than conventional aluminum pistons. The steel crown construction improves resistance to cracking, minimizes crown deformation, and supports higher cylinder pressures—making the M-7795 piston ideal for turbocharged and common-rail diesel applications. This piston features precision-machined ring lands, controlled expansion geometry, and an optimized skirt profile to reduce friction and maintain piston stability. When paired with the correct piston rings, pin, and retainers, it helps restore factory compression, control oil consumption, and reduce blow-by during engine operation. The Cummins M-7795 steel crown piston is commonly installed during engine rebuilds, in-frame overhauls, piston replacements, and professional remanufacturing projects . It is trusted by diesel technicians, fleet maintenance teams, and engine builders who demand OEM-equivalent strength and reliability. Cross-Reference (OEM) Aftermarket Reference: M-7795 OEM References: 5258754, 5258755 Size: Standard (STD) Type: Steel Crown Piston