D/S,AIR FILTER, PRIMARY OBROUNSpecifications Item Description The Donaldson primary air filter is engineered with precision, boasting a lower initial restriction that safeguards engine performance and promotes fuel economy. Its greater filter capacity translates to an extended filter life, reducing the frequency of replacements and saving you money on maintenance. With actual dimensions of 10. 11 inches in width, 9. 31 inches in height, and a length of 15. 07 inches, this filter