CNC Ported Cylinder Kits

Wake up your saw with precision CNC porting from 309 Machine. Our focus is simple: maximize power while maintaining the reliability and durability professionals expect.

These CNC Ported Cylinder Kits represent the ideal balance of high performance and longevity, delivering increased torque and horsepower along with improved throttle response and cutting performance.

What’s Included;***

• Brand new OEM Stihl Cylinder Kit
     • OEM cylinder
     • OEM piston
     • Piston rings
     • Piston Wrist Pin
     • Circlips
• 309 Machine Decomp Plug

Base gasket must be reused or replaced. Gaskets are sold separately. We recommend using a piston ring clamp set when installing a new cylinder.

Performance Work Includes;

• Intake port enlargement, timing and texturing (some models)
• Exhaust port enlargement, timing, and polishing
• Squish band machining for improved combustion efficiency
• Base cut for increased compression
• Transfer port adjustments and flow optimization

Perfect for refreshing a tired saw or for those who want ported performance without long lead times. These units are in stock and ready to ship.

For maximum performance, we recommend pairing this cylinder with a performance exhaust and high flow air filter.

*** There are slight variations of whats included based on the specific model. Please refer to the picture to verify the contents of the kit.***