The Freightliner Classic 13 Inch Rear Air Cleaner Kits are a practical and reliable solution for your truck's air filtration needs. Made of durable stainless steel, these kits are available with either 12 - 2 inch holes or 6 slotted holes, providing flexibility for your specific requirements. With a 13 inch air cleaner kit and no lights included, this kit fits most 13 inch Donaldson standard air cans. Trust in the quality and functionality of these kits to keep your truck running smoothly and efficiently.