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- USA
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Ships within 48 hours · Estimated delivery Jul 13 - Jul 18
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Description
Idler Pulley 3971876 for Cummins 4B3.9 6C8.3 ISB/ISD4.5 CM2150 ISBE CM800 QSL9 CM850Replacement part number: 3971876 Application: Fit for Cummin Engine: 4B3. 9, 6C8. 3, ISB ISD4. 5 CM2150 B119, ISB ISD4. 5 CM2150 SN, ISB ISD6. 7 CM2150 SN, ISB4. 5 CM2150, ISBE CM800, ISBE4 CM850, ISC CM850, ISF2. 8 CM2220 F122, ISF3. 8 CM2220, ISL CM2150, ISL CM850, ISL9 CM2150 SN, NH NT 855, QSL9 CM850(CM2850)
Replacement part number:
3971876
Application:
Fit for Cummin Engine:
4B3.9, 6C8.3, ISB/ISD4.5 CM2150 B119, ISB/ISD4.5 CM2150 SN, ISB/ISD6.7 CM2150 SN, ISB4.5 CM2150, ISBE CM800, ISBE4 CM850, ISC CM850, ISF2.8 CM2220 F122, ISF3.8 CM2220, ISL CM2150, ISL CM850, ISL9 CM2150 SN, NH/NT 855, QSL9 CM850(CM2850)
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.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 986 reviews
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Product Reviews
★★★★★ 5
Very good blue jean jacket
Size: X-Large, Color: Stone Medium Wash
Great jean quality. Fits true to size. Picture matches the jacket and color. Worth the value for sho!!
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Reviewed in the United States on May 14, 2026
★★★★★ 5
Impressed
Size: XX-Large, Color: Black
I’ll be honest, I didn’t have the highest expectations for this jacket. However, I very pleasantly surprised by the fit and quality. The jacket fit very well and just as I expected. The quality was even more impressive with the weight and overall quality of the denim. For the the price, this jacket definitely hits all the marks. I was able to style it perfectly with a hoodie.
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Reviewed in the United States on April 16, 2026
★★★★★ 5
A timeless classic at a great price
Size: X-Large, Color: Black, Size: X-Large, Color: Black
This is honestly a very well-made denim jacket, with all the classic features found on a Type III Trucker Jacket: 2 breast pockets, 2 side pockets, 2 inner pockets. The material feels very comfortable and thick and strong at the same time. A multi purpose jacket that will be your perfect companion for almost all seasons in almost all situations. I took an XL size because I wanted to wear a sweatshirt under it. I weigh 198 pounds and am 5.7 tall. I will probably buy another one in L size for a tighter fit.
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Reviewed in the United States on April 3, 2026
★★★★★ 4
Quality shirt
Size: X-Large, Color: Tinted Dark Wash
Would of liked a slim fit. Needed taper in the waist neck and shoulders fit great
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Reviewed in the United States on May 7, 2026
★★★★★ 5
Great price great value
Size: Large, Color: Black
Better than expected. Great fit, deep black color. Nice quality.
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Reviewed in the United States on May 10, 2026