Hyway Premium Nikasil Cylinder + Crankshaft, Rebuild Kit compatible with Stihl MS391

Hyway Premium Titanikel-Plated 49 mm Complete Rebuild Kit for Stihl MS391

Rebuild your Stihl MS391 with the toughest, longest-lasting aftermarket cylinder available — the
Hyway Titanikel-Plated 49 mm Complete Rebuild Kit.
A true drop-in replacement for OEM part
1140 020 1204, this premium kit restores factory-fresh performance while dramatically outlasting the original Nikasil bore — and now includes everything you’ll need for a full top-end + bottom-end overhaul in one box. It’s specifically designed for models with a 3 bolt intake, ensuring a perfect fit for your specific Stihl MS391 model.

Crafted with Hyway’s exclusive Titanikel plating, this cylinder offers superior wear resistance, excellent heat dissipation, and proven scoring protection — the smart choice for professional loggers and heavy firewood cutters who demand maximum uptime from their MS391.

Complete Kit Includes:

• Hyway Titanikel-plated cylinder – 49 mm bore
• Piston, rings, wrist pin, circlips, base gasket
• Crankshaft (1140 030 0401)
• Crankcase bearing set (9503-003-0440)
• Oil seals ×2 (9638-003-1581)
• Needle cage bearing (9512-003-3061)
• NGK BPMR7A spark plug (1110-400-7005)
• Air filter (1141-140-4400)

Key Features:

• Premium Hyway Titanikel-plated cylinder with 49 mm bore
• Replaces OEM part number 1140 020 1204
• Direct bolt-on fit for Stihl MS391 (models that use a 3 bolt intake)
• Precision Fit: Engineered to exact OEM specifications for seamless installation
• Durable Construction: Built from high-grade materials to withstand rigorous professional use
• Enhanced Performance: Runs cooler and lasts significantly longer than stock Nikasil

What is Titanikel Plating?

Titanikel plating is a sophisticated technology developed by Hyway, involving a blend of titanium and nickel applied through a high-temperature steam plating process. This method uses temperatures of 900 to 1000 degrees Celsius to create a robust, wear-resistant surface perfect for engine components.

Titanikel Plating Process:

The process starts with multi-composite electroplating, coating the cylinder with a titanium-nickel composite. After plating, the surface is polished with diamond tools to achieve an exceptionally smooth finish due to titanium’s high strength.

Benefits of Titanikel Plating:

• High Temperature Resistance: Can handle extreme temperatures, ensuring the cylinder remains intact under heavy use
• Durability: The titanium-nickel combination enhances wear resistance, significantly extending cylinder life
• Chemical Resistance: Titanium’s natural resistance protects against environmental factors
• Smooth Operation: Ultra-smooth finish reduces friction, improving efficiency and reducing wear on other components
• Optimal Strength-to-Weight Ratio: Balances high strength and low weight, crucial for chainsaw performance

Compatibility:

Stihl Models:

• Stihl MS391
• Important Note: This kit will ONLY fit models that use a 3 bolt intake.

Note: Professional installation is recommended to ensure proper fit and performance. Verify compatibility with your specific Stihl model before purchasing.

One box, one perfect rebuild — keep your MS391 cutting strong season after season with the
Hyway Titanikel 49 mm Complete Rebuild Kit at an unbeatable value from HL SUPPLY!