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Ships within 48 hours · Estimated delivery Oct 15 - Oct 20
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Description
3946116 | Genuine Cummins® Coolant ThermostatDescription: Coolant Thermostat Condition: New Brand: Cummins Part Number: 3946116 Type: Thermostat Fitment Guide: Cummins 4B3. 9, 6A3. 4, 6B5. 9, B GAS INTERNATIONAL CM556, B4. 5, B4. 5 CM2350 B129B, B4. 5 CM2350 B146C, B4. 5 CM2350 B147B, B4. 5 RGT, B4. 5S, B5. 9 G, B5. 9 GAS PLUS CM556, B5. 9 LPG, B5. 9 LPG PLUS CM556, B6. 7 CM2350 B121B, B6. 7 CM2350 B135B, B6. 7 CM2350 B136C, B6. 7 CM2350 B148B, B6. 7 G CMOH6. 0 B125, B6. 7N CM2380 B150B, B6. 7S,
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
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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- Please click here for more details>>> Return & Exchange Policy
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Best in 7 days
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Best in 7 days
4.0 ★★★★★
Based on 2403 reviews
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Product Reviews
★★★★★ 5
Excellent to have on hand
Style: 16x25x1
Excellent, time-saving purchase. Sturdy, easy to install.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
★★★★★ 4
Great Fit and Noticeable Air Quality Improvement
Style: 12x24x1
I purchased the Filterbuy 12x24x1 MERV 8 air filters and have been very happy with them so far. They fit perfectly in my HVAC system without any gaps or issues during installation.
After replacing my old filters, I noticed the air in my home feels cleaner and there seems to be less dust settling around the house. They do a good job of capturing everyday particles and allergens while still allowing good airflow.
Overall, this is a reliable and cost-effective 4-pack of filters. Solid quality, easy to install, and a noticeable improvement in air freshness. I’ll definitely be ordering again.
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Reviewed in the United States on April 30, 2026
★★★★★ 5
Reliable furnace filters at a good price point!
Style: 16x18x1
Great filters. Hard to find sizes. Sturdy.
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Reviewed in the United States on May 21, 2026
★★★★★ 5
Amazon very professional and reliable
Style: 14x30x1
I was very pleased with the Filterbuy 14 30 1 and it fit great and very pleased with Amazon .They are very professional
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Reviewed in the United States on May 13, 2026
★★★★★ 5
Great buy
Style: 20x25x2
Great fit, quality, construction, and less expensive than buying them at a regular store.
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Reviewed in the United States on May 20, 2026
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