3178366 Male Adapter Elbow - High-Quality Replacement Part for Cummins Engine K19 K38 K50 QSK The 3178366 Male Adapter Elbow is a premium replacement component designed specifically for Cummins Engine K19 K38 K50 QSK applications. Engineered to meet or exceed original equipment manufacturer (OEM) specifications, this male adapter elbow ensures optimal performance, durability, and reliability in even the most demanding operating conditions. With part number 3178366, this male adapter elbow is a direct fit replacement, making installation quick and hassle-free. It is manufactured using high-grade materials that provide excellent resistance to wear, corrosion, and extreme temperatures, ensuring long service life and consistent performance.