STIHL 20-inch guide bar part 3003 008 8921 shown on a white background

Stihl

STIHL 20 Inch Chainsaw Bar Guide Part Number 3003 008 8921 | Genuine OEM

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STIHL 20" Chainsaw Guide Bar
Part Number 3003 008 8921
STIHL 3003 008 8921 — 20" Chainsaw Guide BarSTIHL 20" Rollomatic E Professional ...
Also known as: STIHL bar, 20-inch guide bar, chainsaw rail, saw bar
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Specifications
Specification Detail
Part Number 3003 008 8921
Brand STIHL
Bar Length 20 Inches
Part Type Chainsaw Guide Bar
OEM / Aftermarket Genuine OEM
The STIHL 3003 008 8921 is a genuine OEM 20-inch chainsaw guide bar designed to direct the cutting chain on compatible STIHL chainsaw models. Also referred to as a saw bar, guide rail, or chainsaw rail, this part is the structural track along which the chain travels during operation. It is a direct replacement for worn or damaged bars and is engineered to STIHL's original specifications for consistent performance and chain alignment.
Key Features▼
20-Inch Bar Length for Mid-Range Cutting
The 20-inch cut length of part 3003 008 8921 suits a wide range of felling and bucking tasks, making it a popular bar size for both homeowners and professional arborists using STIHL chainsaws.
OEM STIHL Replacement Bar for Accurate Chain Fit
As a genuine STIHL component, part 3003 008 8921 is manufactured to the same tolerances as the original, ensuring proper chain tensioning, smooth guide groove engagement, and reduced wear on the drive sprocket.
Direct Fitment OEM Cross-Reference Part 3003 008 8921
STIHL part number 3003 008 8921 is the manufacturer-original reference number for this guide bar. It replaces worn, bent, or grooved bars and cross-references directly within the STIHL parts catalog for compatible saw models.
Compatible with Select STIHL Gas Chainsaw Models
This STIHL 20-inch bar is designed to fit specific STIHL chainsaw models requiring this bar mount pattern and pitch combination. Always verify your saw's bar mount and chain specifications before ordering.
Compatible Equipment▼

STIHL guide bar 3003 008 8921 is a 20-inch replacement bar intended for select STIHL chainsaw models. Verify your saw's bar specifications before purchase.

Common STIHL chainsaw models that may use a 20-inch guide bar with part number 3003 008 8921 include the MS 250, MS 271, MS 291, MS 311, and MS 391 series, though confirmation against your model's parts diagram is always recommended.

  • STIHL MS 250
  • STIHL MS 271
  • STIHL MS 291
  • STIHL MS 311
  • STIHL MS 391

Always confirm fitment using your chainsaw's serial number and official STIHL parts diagram before ordering.

Common Questions▼
Q: What chainsaw models is STIHL part 3003 008 8921 compatible with?
A: Part 3003 008 8921 is a 20-inch STIHL guide bar compatible with select mid-range STIHL gas chainsaw models. Common fits include the MS 271, MS 291, MS 311, and MS 391, but you should always verify using your saw's model number and the official STIHL parts diagram.
Q: Is STIHL 3003 008 8921 a genuine OEM part or an aftermarket bar?
A: Yes, part number 3003 008 8921 is a genuine OEM STIHL guide bar, manufactured to the original equipment specifications. It is not an aftermarket or third-party product, which ensures proper chain fit and safe operation.
Q: How do I know when to replace my STIHL chainsaw guide bar?
A: Signs that you need a replacement guide bar like STIHL part 3003 008 8921 include a bent or warped bar, excessive groove wear causing chain slop, visible cracks, uneven cutting, or the bar nose sprocket failing to spin freely. Replace the bar at the same time as a worn chain for best results.
Q: What chain pitch and gauge does the STIHL 3003 008 8921 20-inch bar use?
A: The chain pitch and gauge required for STIHL guide bar 3003 008 8921 should be confirmed by referencing your STIHL saw's owner manual or the markings stamped directly on the bar itself. Common combinations for STIHL 20-inch bars include 3/8-inch pitch and .050-inch gauge, but always verify before purchasing a replacement chain.
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