Proline® 49MM × 1.2MM Piston Rings For Stihl MS391 & MS311 Big Bore
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Proline® 49MM × 1.2MM Piston Rings For Stihl MS391 & MS311 Big Bore

$8.95

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SKU: PR4912 Barcode: 86397219

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Description Fit Models Warranty

Proline® piston rings for Stihl MS391 chainsaws and MS311 models equipped with a 49 mm big-bore cylinder. Compare your original rings and OEM part number before ordering to verify proper fitment. Actual product pictures are shown. Parts are not made in China.

⚠️ FITMENT NOTE: MS311 fits 49 mm big-bore conversions only. Standard MS311 models use a 47 mm piston.

Includes:

  • Piston rings (2)

Specs:

  • Size: 49mm × 1.2mm
  • End gap type: Side pin
  • Color: Black

Replaces Stihl OEM #:

  • 1140 034 3001, 11400343001

⚠️ IMPORTANT FITMENT

  • Fits 49 mm × 1.2 mm piston applications only
  • Standard MS311 models use a 47 mm piston
  • MS311 fitment is for 49 mm big-bore conversions only
  • Compare your original ring size and OEM part number before ordering

Stihl

Chainsaws:

  • MS391
  • MS311 — 49 mm big bore only
  • MS361 — 49 mm big bore only

Warranty

Proline® internal engine components e.g  cylinder , piston, bearings piston rings and electrical parts have a 90 day warranty from the day of purchase. (**Conditions Apply)

Carburetors carry a 30 day warranty from day of purchase.

All other Proline® parts carry a 120 day warranty.

Original (OEM) parts (Tools excluded) are 30 days. If you need to return a part please contact us for a Return Authorization Number (RMA)

If you need to return an item, please contact us with your order number and details about the product you would like to return. We will respond quickly with instructions for how to return items from your order.

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