Miller Big Blue Spark Arrestor and Muffler Kit

Miller 300585 Spark Arrestor Kit for Big Blue Series

Equip your rig for any terrain with the Miller Spark Arrestor (Muffler) Kit (300585). For professional welders operating engine-driven machines in the field, access to certain job sites often depends on meeting strict fire safety codes. This genuine Miller accessory is the definitive solution for converting your standard exhaust system into a compliant, spark-arresting muffler system. It is specifically engineered to fit the Big Blue 400 Pro, 400 PipePro, and 450 Duo CST diesel welders, ensuring a perfect mechanical fit and reliable performance.

The primary function of this kit is to capture and retain carbon deposits and other particulate matter generated during the combustion process. Without a spark arrestor, these hot particles can be ejected from the exhaust stack, creating an immediate fire hazard in dry conditions. This is why the kit is mandatory when operating on California grasslands, brush, or forest-covered land, and is required equipment for work in all National Forests. It meets the U.S. Forest Service Standard 5100-1B, a specification often checked by job site safety inspectors and forestry rangers.

This is a field-installed kit, meaning it is designed for straightforward installation on existing machines without the need for extensive fabrication or modification. The kit replaces or augments the standard muffler assembly to provide the necessary filtration. Weighing approximately 5 lbs and measuring 6x6x8 inches, it is a compact yet rugged addition to your welder. The construction is built to handle the high exhaust temperatures and continuous vibration of a diesel engine running at full load, ensuring long service life and minimal maintenance.

Don't get shut down or fined for non-compliance. Whether you are welding pipe in the high desert or repairing equipment in a logging camp, the Miller 300585 Spark Arrestor Kit ensures your Big Blue welder is ready for the job. It protects the environment, protects your liability, and ensures your equipment runs as designed by the manufacturer. Verify your machine's serial number or model compatibility to ensure this is the correct kit for your specific engine drive.