CNC cylinder porting for optimized airflow and increased power
Exhaust port enlargement for improved engine efficiency
Timing and polishing for precise engine performance
Squish band cut for smaller combustion area to boost compression
Baffle thinning and muffler hole enlargement for reduced noise and increased airflow
Summarized by Shop
309 Machine's CNC Ported HP500i is the ultimate mix of power and lightweight.
HP stands for High Performance, and that's what we are all about. We strive to maximize power while focusing on durability and reliability.
This is for the Power Head Only (PHO). Performance work includes;
CNC Cylinder porting
Exhaust Port enlargement, timing
Compatible with
309 machine chainsaw power heads
Material
Billet aluminum
Color
Orange, White, Black
Includes
Decompression plug, billet muffler cover, Westcoast saw foam air filter
Manufacturer type
HP (High Performance)
Summarized by Shop
4.9
34 ratings
5
4
3
2
1
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
H
Harvey · July 23, 2026
Awesome
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!
T
tom · July 28, 2026
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.
