This is the Chicago Pneumatic muffler – complete part number 3303005377, Crowder SKU CP-3303005377. It silences the exhaust pulse. Once it clogs, the tool works against its own back pressure.
It appears on the CP 1290SPDR Spike Driver breakdown. The tool itself is the CP 1290 Pneumatic Spike Driver. Worth matching the reference number on the diagram against your own machine before you order the same part number can sit in more than one position.
Need the parts around it? They are on the same breakdown, and the parts diagram hub covers every machine we publish. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.
- Part number: 3303005377
- Manufacturer: Chicago Pneumatic
- Crowder SKU: CP-3303005377
- Listed on breakdowns for: CP 1290SPDR Spike Driver

