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Description
Belt Tensioner 5270678 for Cummins B3.3/B4.5/4B3.9 EnginesReplacement part number: 5270678, 4929688, 38702, 0239233 Fit for Cummins Engine: B3. 3, B4. 5, 4B3. 9, 6B5. 9, B6. 7, B6. 7 CM2350 B121B, B6. 7 CM2350 B136C, B6. 7 CM2350 B157C, B6. 7 CM2450 B155B, B6. 7N CM2380 B150B, ISB CM2150, ISB ISD6. 7 CM2150 SN, ISB6. 7 CM2250, ISB6. 7 CM2350 B101, ISB6. 7 G CM2180 B118, ISBE CM2150, ISBE4 CM850, ISL CM554, L9 CM2350 L116B, QSB3. 3 CM2150, QSB3. 3 CM2250 EC, QSB6. 7 CM2250, QSB6. 7 CM2250 EC, QSB6. 7 CM2350
Replacement part number:
5270678, 4929688, 38702, 0239233Fit for Cummins Engine:
B3.3, B4.5, 4B3.9, 6B5.9, B6.7, B6.7 CM2350 B121B, B6.7 CM2350 B136C, B6.7 CM2350 B157C, B6.7 CM2450 B155B, B6.7N CM2380 B150B, ISB CM2150, ISB/ISD6.7 CM2150 SN, ISB6.7 CM2250, ISB6.7 CM2350 B101, ISB6.7 G CM2180 B118, ISBE CM2150, ISBE4 CM850, ISL CM554, L9 CM2350 L116B, QSB3.3 CM2150, QSB3.3 CM2250 EC, QSB6.7 CM2250, QSB6.7 CM2250 EC, QSB6.7 CM2350 B105, QSG12/X12 CM2350 G110, ISB, QSB
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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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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- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 5
Nice shirt!
Color: Black, Size: Large
When I lost weight and hit my goal I wanted to purchase new clothing. I discovered Coofandy on Amazon and could not be happier. This line of clothing is great. I have purchased a handful of shirts and shorts and liked all of them. This shirt fits well, I tried a medium initially and it was a bit too small so I moved up to a Large. Prior to my weight loss I was always an X-large. Shirt looks nice and fits great. I have this shirt in 3 colors now.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
★★★★★ 5
Best fit, Stylish and casual shirt out there.
Color: White, Size: X-Large
wow, I purchases every color of these. they are my favorite shirts. the fit is comfortable around neck and arms, firm but not uncomfortable.
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Reviewed in the United States on April 19, 2026
★★★★★ 5
Great shirt, a bit large in arms
Color: A - Moon Gray, Size: Medium
I really like the cut and texture of the shirt. The only thing I would say is it is loose in the arms unless you’re a body builder. My arms are toned, muscular, but more lean than thick, so if you like a snug sleeve this is probably not for you. I’m 5’9” 180bs for reference and wear a medium.
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Reviewed in the United States on June 2, 2026
★★★★★ 5
Check the size chart and reviews!
Color: Black, Size: 3X-Large, Color: Black, Size: 3X-Large
Bought this for my husband and if i didnt check the reviews I would ordered it too small. He normally wears a XL in T-shirts but he has very large arms so the 3XL in this fits him comfortably. The material is a bit stretchy so he could have probably taken the 2XL but I am satisfied with how the 3XL looks on him. He looks so good!
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Reviewed in the United States on May 31, 2026
★★★★★ 1
Size discrepancy
Color: Wine Red, Size: Small
I like the look and feel of this shirt, but I originally bought a medium and it was too big, so I bought a small. Both shirts are the exact same size. It is labeled on the collar as a different size, but it's the same. If anything the small is slightly larger
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Reviewed in the United States on June 5, 2026
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