The Meteor Piston Assembly is a genuine replacement part for Stihl professional chainsaws, engineered to restore compression and cutting performance. Made from high‐grade aluminium alloy for strength and heat stability, it is designed for the Stihl 066 and MS660 platforms and manufactured to tight tolerances for a precise fit. The piston measures 54 mm in diameter (2.13 inches), matching the original specification and replacing OEM number 1122 030 2005. It is suitable for routine top‐end maintenance or a rebuild after wear or scoring, helping to keep your saw reliable under sustained load. This is a Genuine Part from Meteor, chosen by many workshops and users for consistent quality and dependable service life in demanding forestry and arborist work.

Key Features:
– Genuine Part from Meteor for consistent quality control and fitment
– 54 mm diameter (2.13 inches) to match OEM sizing and maintain correct compression
– Precision‐machined aluminium alloy for strength, low weight, and thermal efficiency
– Designed for Stihl 066 and MS660 for straightforward installation and setup
– Helps restore starting, power delivery, and fuel efficiency after piston wear
– Durable construction aimed at long service life in heavy‐duty cutting
– Replaces OEM reference 1122 030 2005 for easy cross‐checking
– Suitable for preventative maintenance or full top‐end rebuilds

Typical Applications:
Used during top‐end overhauls of Stihl 066 and MS660 chainsaws to address loss of compression, hard starting, or reduced power after ring or piston wear. Ideal for workshop rebuilds, regular fleet maintenance, and repairs following seizure or scoring, keeping professional felling, milling, and site clearance saws running smoothly.

Also known as:
54 mm piston assembly for large Stihl chainsaws, 066/MS660 top‐end piston, Stihl 1122‐series piston assembly, 54 mm chainsaw piston kit for pro‐grade Stihl models.

Fits Models:
066, MS660

Alternate Part Numbers:
1122 030 2005, 11220302005, PC1756B

Product Specifications