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Description
BF99931 HYDRAULIC SHOCK ABSORBER (REAR, FREIGHTLINER / KENWORTH / INTERNATIONAL / PETERBILT)Technical Specifications Part Type Hydraulic Shock Absorber (Rear) Part Number BF99931 Brand Line Buffalo (SAP) Description Heavy duty hydraulic rear shock absorber Bore 1 5 8 inch Application Freightliner, International, Kenworth, Peterbilt heavy duty trucks Cross References Brand Part Number Buffalo SAP BF99931 Gabriel 85931 Monroe 65522 Application Heavy duty hydraulic rear shock absorber for Freightliner, International, Kenworth, Peterbilt trucks
Technical Specifications
| Part Type | Hydraulic Shock Absorber (Rear) |
| Part Number | BF99931 |
| Brand / Line | Buffalo (SAP) |
| Description | Heavy-duty hydraulic rear shock absorber |
| Bore | 1 5/8 inch |
| Application | Freightliner, International, Kenworth, Peterbilt heavy-duty trucks |
Cross References
| Brand | Part Number |
|---|---|
| Buffalo / SAP | BF99931 |
| Gabriel | 85931 |
| Monroe | 65522 |
| Application | Heavy-duty hydraulic rear shock absorber for Freightliner, International, Kenworth, Peterbilt trucks |
Vehicle Fitment
| Make | Model | Model Years | Notes |
|---|---|---|---|
| FREIGHTLINER | Cascadia | 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 | Rear hydraulic shock absorber |
| Century Class | 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 | Rear hydraulic shock absorber | |
| Columbia | 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 | Rear hydraulic shock absorber | |
| Coronado | 2001, 2002, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2016 | Rear hydraulic shock absorber | |
| INTERNATIONAL | 9200i | 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 | Rear hydraulic shock absorber |
| 9400i | 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 | Rear hydraulic shock absorber | |
| 9900i / 9900ix | 2000, 2002, 2003, 2004, 2006, 2007, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 | Rear hydraulic shock absorber | |
| ProStar | 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 | Rear hydraulic shock absorber | |
| Lonestar | 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 | Rear hydraulic shock absorber | |
| KENWORTH | T800 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 | Rear hydraulic shock absorber |
| W900 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 | Rear hydraulic shock absorber | |
| T600 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 | Rear hydraulic shock absorber | |
| PETERBILT | 379 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 | Rear hydraulic shock absorber |
| 389 | 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 | Rear hydraulic shock absorber | |
| Notes | Heavy-duty hydraulic rear shock absorber for heavy-duty trucks. Replaces Gabriel 85931 and Monroe 65522. Also fits Western Star and Sterling models with compatible rear suspension. | ||
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.7 ★★★★★
Based on 426 reviews
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Product Reviews
★★★★★ 5
Works
Fit my 1996 xr6 150 just fine. Engine runs at correct temperature so they are working as they should.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 13, 2026
★★★★★ 5
Quick delivery
Fit like they should and seems to be working great
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Reviewed in the United States on March 15, 2026
★★★★★ 5
Great product
Great product
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Reviewed in the United States on December 30, 2025
★★★★★ 5
Fit Mercury 150 saltwater 2 stroke great!
These fit my Mercury 150 perfect. Took it out for a test run and engine ran great with no overheating issues.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 26, 2025
★★★★★ 5
Work’s okay
They work ok, as expected
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Reviewed in the United States on August 26, 2025