Overview

The STIHL 52 mm Piston Assembly Kit is a high-precision replacement engine component designed for professional-grade STIHL heavy-duty chainsaws (such as the MS 460, MS 461, and MS 381 models featuring a 52 mm cylinder bore). Engineered to withstand extreme combustion pressures and thermal loads, this complete piston kit restores optimal compression, engine power, and fuel efficiency during major engine overhauls.

Manufactured from high-strength aluminum alloy with wear-resistant surface coatings, the piston features precision-machined ring grooves, piston rings, a high-strength steel wrist pin (gudgeon pin), and secure circlips. Replacing a worn or scored piston and ring set revitalizes engine torque, prevents blow-by, and extends the operational working life of professional forestry equipment.

Key Features & Benefits

• Precision 52 mm Bore Sizing: Exact dimensional tolerances ensure seamless fitment in compatible professional STIHL cylinders.

• Complete Assembly Kit: Supplied with piston, compression rings, wrist pin, and retaining circlips for a complete top-end refresh.

• High-Strength Aluminum Alloy: Heat-resistant alloy prevents thermal expansion distortion under sustained heavy-duty cutting loads.

• Wear-Resistant Surface Treatment: Minimizes friction against cylinder walls and reduces scuffing during high-RPM operation.

• Restores Compression & Power: Eliminates power loss caused by worn rings or scored piston skirts, restoring factory engine performance.