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. The HP2511TN Short Block Kit represents 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 complete OEM Echo 2511 short block• Part Number SB1120 Performance Work Includes • CNC cylinder porting• Adjustments to the intake and exhaust ports• Adjustments and blending of the transfer ports• Machined base cut for tighter squish and increased compression• Chamfering of all ports 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 setup with a performance exhaust. Fitment • Echo 2511
