The McCormick 6678141A1 is a genuine fuel injector designed for optimal engine performance in McCormick X4 series tractors, including models X4.20 to X4.120. This essential component ensures precise fuel delivery, contributing to efficient combustion and reduced emissions. It is also compatible with various Case IH Farmall C series and New Holland T4 series tractors. This injector is a direct replacement for OEM part numbers 47683979 and 504380106, offering reliable fitment and performance.