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Description
Pressure Regulator Plunger 3945967 for Cummins 6C8.3, B3.3, G8.3 EnginesReplacement part number: 3945967 Application: Fit for Cummins Engine: 4B3. 9, 6B5. 9, 6C8. 3, B3. 3, B4. 5, B6. 7 CM2350 B121B, C GAS PLUS CM556, C8. 3 G, G8. 3, G8. 3 CM558, GTA8. 3 CM558, ISB6. 7 CM2250, ISBE4 CM850, ISC CM2150, ISC CM554, ISC CM850, ISC8. 3 CM2250, ISC8. 3 G CM2180 C101, ISF2. 8 CM2220 F122, ISF3. 8 CM2220, ISL CM2150, ISL CM554, ISL CM850, ISL G CM2180, ISL8. 9 CM2150 L110, ISL8. 9 CM2880 L112, ISL8. 9 CM2880 L140, ISL9 CM2150 SN,
Replacement part number:
3945967Application:
Fit for Cummins Engine: 4B3.9, 6B5.9, 6C8.3, B3.3, B4.5, B6.7 CM2350 B121B, C GAS PLUS CM556, C8.3 G, G8.3, G8.3 CM558, GTA8.3 CM558, ISB6.7 CM2250, ISBE4 CM850, ISC CM2150, ISC CM554, ISC CM850, ISC8.3 CM2250, ISC8.3 G CM2180 C101, ISF2.8 CM2220 F122, ISF3.8 CM2220, ISL CM2150, ISL CM554, ISL CM850, ISL G CM2180, ISL8.9 CM2150 L110, ISL8.9 CM2880 L112, ISL8.9 CM2880 L140, ISL9 CM2150 SN, ISL9 CM2250, ISL9 CM2350 L101, ISL9 CM2350 L111, ISL9.5 CM2150 SN, ISL9.5 CM2880 L138, ISLE4 CM850, L GAS PLUS CM556, L8.9, L8.9 CM2880 L146G, L8.9 L121, L8.9G CMOH2.0 L125B, L9 CM2350 L116B, L9 CM2350 L119B, L9 CM2350 L120C, L9 CM2350 L123B, L9 CM2350 L129C, L9 CM2350 L133C, L9 CM2450 L126B, L9 CM2450 L143C, L9 CM2670 L128B, L9 CM2670 L132B, L9 CM2670 L134C, L9 CM2670 L135C, L9 CM2670 L136C, L9 CM2670 L137C, L9.3 L105, L9.5 L117, L9N CM2380 L124B, L9N CM2380 L130B, L9N CM2380 L142B, N14 MECHANICAL, NH/NT 855, QSB3.3 CM2150, QSB6.7 CM850 CM2850, QSC8.3 CM2880 C102, QSC8.3 CM554, QSC8.3 CM850 CM2850, QSC9 CM2250, QSL9 CM2250, QSJ8.9 G, QSL8.9 CM2150 L141, QSL9 CM2250, QSL9 CM2250 L115, QSL9 CM2350 L102, QSL9 CM2350 L107, QSL9 CM2350 L118, QSL9 CM554, QSL9 CM850 CM2850, QSL9 G CM558, QSL9 M CM2250 L106, QSL9.3 CM2880 L113
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4.8 ★★★★★
Based on 1395 reviews
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Product Reviews
★★★★★ 4
Great results when used carefully
This is a strong exfoliating peel, and it definitely works. The milk texture spreads easily and feels controlled, but you can tell right away that this is not a beginner exfoliant. At 15% glycolic acid, it delivers noticeable smoothing and brightness when used carefully.
I started slowly and kept my routine very simple afterward, focusing on hydration and barrier support. Used this way, it helped refine texture and made my skin look clearer and more even. When I increased usage too quickly, I noticed dryness, which was a good reminder that this peel needs to be respected.
I would recommend this to experienced skincare users who are comfortable with chemical exfoliation and understand the importance of spacing treatments and supporting the skin barrier. It’s effective, but not something to rush or overuse. I used less than the recommended amount and it was still a little spicy for me.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 22, 2026
★★★★★ 5
Restored my glow and smoothness in ONE use!
Restored my glow and smoothness in ONE use!
I am 47, and I’ve really started to notice my skin losing its natural glow and becoming a bit dull. I decided to try the Prequel Multi-Acid Milk, and I am honestly obsessed.
The results were immediate—literally after one use, my skin felt incredibly soft and hydrated. I’ve been using it twice a week, and the difference is night and day. My skin looks much younger, smoother, and that healthy radiance is finally back.
If you struggle with any kind of roughness or uneven texture, this is the solution. It completely clears it up. It’s rare to find a product that delivers such fast results without being harsh. If you're on the fence, definitely give it a try!
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Reviewed in the United States on May 8, 2026
★★★★★ 5
Excellent product
It’s amazing. Not too harsh but does the trick. I love this product. My face flushes a little but is normal by in the morning. My skin glows like it never did before. It took about a week for me to see an obvious difference in my complexion. I am sold on continuing to use this daily. It’s not as expensive as a face peel or microdermabrasion.
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Reviewed in the United States on April 17, 2026
★★★★★ 5
Effective Toner
Staple product! This has a tiny sting that lets me know it’s working. My skin feels so smooth my makeup is gliding on.
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Reviewed in the United States on May 13, 2026
★★★★★ 5
Perfect Statue
Color: Venus - Large Antique, Color: Venus - Large Antique
This Venus De Milo statue is gorgeous. It is very sturdy but not too heavy…….. it appears heavier than it is which I adore since it is a statue. It has an “aged” coloring around the facial features and intricate details which makes it more authentic looking. I love Greek mythology and this piece is a perfect addition to my living room decor. Definitely worth the price.
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Reviewed in the United States on March 7, 2026
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