309 Machine's CNC-ported HP500i is the ultimate mix of power and light weight.
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
Muffler work: port matching, baffle thinning and hole enlargement
309 Machine decompression plug installed
Undaunted Manufacturing billet muffler cover
Independently modified, not a factory STIHL® product.
This saw is built on a genuine STIHL® MS 500i 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.
From the first cut thru a 25 inch log. What a monster to my stock 500i with muffler mod. Breaking it in will be pure joy! Big smile everytime!
H
Harvey Byler
500 I
$2500 a lot of money for a chainsaw but if you’re income is based on production, it’s money well spent this is my second saw
Have no complaints whatsoever
A
Anonymous
Ease of purchase
Love the ability to purchase and have it shipped to doorstep. Wish they offered Max Flow filters. West Coast products in my opinion are sub par cool guy stuff.
J
Jason Henry
utility vegetation management company owner
the ported 500i works very well.
R
RickG
Great Experience on 500i
Mike was very helpful and prompt in answering all of my questions and the saw exceeded all expectations. Packaging was first class and the saw is awesome! Highly recommend 309 if you are looking for a ported saw.
