The HP881 is the ultimate mix of big-bar power and durability.
HP stands for High Performance, and that's what we're all about. We work to get the most power out of every saw while keeping durability and reliability front and center.
This listing is for the powerhead only (PHO). Bar and chain are not included.
Performance work includes:
CNC cylinder porting
Exhaust port enlarged, timed and polished
Squish band cut for a tighter combustion chamber
Base cut for increased compression
Upper Transfer Work
Undaunted Manufacturing billet muffler cover
We do not include a decompression plug on this saw due to the increased compression and difficulty to start.
Independently modified, not a factory STIHL® product.
This saw is built on a genuine STIHL® MS 881 powerhead that 309 Machine, LLC has independently CNC-ported and modified. It is sold as a performance-modified product, not as a new, factory-original saw. 309 Machine is not affiliated with, authorized by, endorsed by, or sponsored by STIHL. STIHL® is a registered trademark of ANDREAS STIHL AG & Co. KG and is used here for identification and descriptive purposes only. Modification voids any original manufacturer warranty. Any warranty or support for this product is provided solely by 309 Machine. See our Product Liability Disclaimer for full terms.
