Proline® performance cylinder piston kit 49mm for Stihl standard bore size for MS390, 039 and big bore for 029 MS290, MS310. Please compare your existing part with ours to verify proper fitment; actual product pictures are shown. This kit is not made in China.
⚠️ IMPORTANT INSTALLATION NOTES:
1. Cylinder Mounting Screws: This cylinder has machine-threaded mounting holes. You MUST use OEM self-tapping screws to cut through/override the existing threads during installation. You may reuse your original OEM self-tapping screws if they are in good condition, or purchase new OEM screws if needed.
2. 2019 Models – Muffler Fitment: The muffler bolt slots MUST be filed larger to achieve proper fitment.
Includes:
- Cylinder
- Piston
- Piston rings
- Circlips
- Wrist pin
⚠️ PRODUCT APPEARANCE:
Cylinder color may vary from the pictures shown. Color variation does not affect fitment or performance.
Specs:
- 49mm
- Proline® Performance Series
-
Requires silicone sealant to assemble use Dirko HT
- Standard bore size for MS390, 039 and big bore for MS310, MS290, 029
- Nikasil plated
- With decompression hole
Replaces Stihl OEM #:
- 1127 020 1216, 11270201216