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309 Machine

CNC Ported HP500i

CNC Ported HP500i

$2,100.00 USD
$2,299.00 USD $2,100.00 USD
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What starts life as a Stihl® MS500i is transformed in 309 Machine's HP500i. 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). Add a Stihl lightweight bar and chain when buying the saw and save 20% off.

Performance work includes;

  • CNC Cylinder porting
    • Exhaust Port enlargement, timing and polishing
    • Squish band cut for smaller combustion area
    • Base cut for increased compression
  • Port matching, baffle thinning and hole enlargement on muffler
  • Oil pump adjustment modification for increased oiling capability (needed for 32” or 36” bars)
  • Removal of compression release

NO BS Pricing! Saw MSRP - Bar and Chain + Porting and Assembly = Fair Price

309 Machine recommends the addition of a performance exhaust (WCS Bark Box) and a performance air filter (MaxFlow) to truly unlock the saw’s potential. 

Stihl® is a registered trademark of Stihl® Incorporated and is used only to describe their products. 

 

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Customer Reviews

Based on 4 reviews
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G
Genin Bowen
Great saw, even better service!

My 500i from 309 is a monster as expected, but the service and attention to detail is what I’m extremely pleased with. The saw came very quickly, and packaged very professionally. It has Great instructions with it, some stickers and a few packs of ams oil. The attention to detail with the little things makes me confident in 309’s porting work. I will definitely have 309 machine do my porting in the future.

J
Jerome West

Great saw

G
Greg Spies
Mike does amazing work Sthil 500i

Amazing job on the saw, cuts like a beast. Thank you for your hard work , amazing customer service and fast shipping. If your shopping around do yourself a favor and go with 309 machine. Mike is incredibly talented and makes sure you have the right build to meet your personal demands.

K
Kyle O
Great saw made better!

I’ve ran a couple different stock 500i. This saw is leaps and bounds greater than any stock saw I’ve ever ran. I have close to 35hrs on it, running clean up from a tornado. This saw runs a .404 chain on a 25” bar faster than a .325 on a 16”, 261. Love this saw and I will be making another purchase from 309!

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