HYWAY Nikasil Pop Up CYLINDER KIT FITS STIHL MS391 49MM

HYWAY 49mm Nikasil Pop-Up Cylinder Kit – Fits Stihl MS391 / MS311 Big Bore

Upgrade your saw’s performance with this brand new Hyway 49mm Nikasil Pop-Up Cylinder Kit, designed for the Stihl MS391 and as a big bore upgrade for the MS311. Engineered for power, durability, and a perfect fit, this kit delivers the compression boost you’ve been looking for.

Kit Includes:

• 49mm Nikasil-plated cylinder for maximum wear resistance

• Pop-up high-compression piston

• Piston rings

• Wrist pin

• Circlips

Key Features:

• High Compression Power Boost – Pop-up piston design typically adds 10+ PSI over stock flat-top pistons for increased horsepower and torque.

• Nikasil Plating – Superior heat dissipation and long service life.

• 1-Year Guarantee – Backed against manufacturer defects for peace of mind.

• Big Bore Upgrade – Fits MS311 for more displacement and output.

• Precision Fitment – Designed for 3-bolt flange setup (will not fit 4-bolt version).

Compatibility:

• Stihl MS391 (direct fit)

• Stihl MS311 (big bore upgrade)

? More compression means more cutting power. Perfect for firewood cutters, loggers, and performance enthusiasts who want more from their saw.