CNC Ported Cylinder Kits Model:HP400C providing exceptional cutting performance right

providing exceptional cutting performance right out of the box

Clean hex design with “Performance By 309” branding

Built tough and designed to last

grease or gummy petroleum residue from foam air filters

CNC Ported Cylinder Kits Model:HP400C providing exceptional cutting performance rightBrand new OEM cylinders cylinder kits that include our CNC porting. We'll CNC port the cylinder and send it to you for reassembly on your saw. **Note: This does not include any modifications to the muffler, timing or tuning. This is why we offer this for a lower price than full saw builds.) Most kits have an approximately 3 week lead time depending on the manufacturer.