The Donaldson P551435 is a high-quality primary air filter designed to provide superior engine protection for Caterpillar equipment. This genuine Donaldson filter effectively captures contaminants, preventing them from entering the engine and maintaining optimal performance and longevity. It is engineered to meet or exceed OEM specifications, ensuring reliable filtration in demanding operating conditions. Key dimensions include an outer diameter of 203.2 mm, an inner diameter of 101.6 mm, and a length of 330.2 mm.