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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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4.3 ★★★★★
Based on 365 reviews
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Product Reviews
★★★★★ 4
these work
Love these they work great, easy to use and clean,bought it again
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Reviewed in the United States on February 23, 2026
★★★★★ 5
Ease of cleaning
Came as advertised. Good quality and came with two scrapers.
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Reviewed in the United States on April 10, 2026
★★★★★ 5
Step up your fresh breath game!
This!!! This is the step I was missing in my oral care routine. I was previously using one of those cheap plastic little scrubbers you get from the dollar store to brush my tongue but didn't feel like it did much, it was just a routine. A friend of mine suggested a metal tongue scraper and said it was really helping to keep her mouth clean and fresh after a bunch of expensive dental work. Well, shoot....why not? I won't pretend like I know all the scientific benefits behind tongue scraping, but all I know is from the first time, I was sold on it. You simply hold both ends in your hands and gently place the curved groove on the back of your tongue towards your throat, scraping gently down towards the tip of your tongue. You'll be shocked at the amount of goo that comes off! At least I was, and I am a daily tongue brusher! Rinse the muck off between each scraping and your tongue will be clean and neat. 2 points of caution: 1) Be careful going too far back at first. It can trigger your gag reflex so only go back as far as you feel comfortable and work your way back. 2) You have really sensitive large taste buds at the base of your tongue, so do not press and drag too hard. You can use a small amount of pressure, but not too much is needed. You can definitely hurt your tongue that way (I did, and it was not nice). I've noticed that my breath is much fresher for much longer on days when I scrape my tongue with this. (I did a control test with my old plastic brush and this steel scraper, and the steel scraper outperformed by a mile). My mouth felt cleaner and I don't know if this can be proven, but I feel like food tasted better? My morning coffee seemed even more enjoyable after my first round of tongue-scraping. You get two for such a good price and it will last such a long time. Get one for you and your SO. To be honest, all the brushing and flossing, and mouthwash in the world doesn't replace scraping all that gunk off your tongue if you want fresh clean breath. I highly recommend it.
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Reviewed in the United States on January 3, 2023
★★★★★ 5
I would buy it again
10/10 gets the job done and more. easy to use and good quality. The design is perfect and has not rusted so far. The best thing is it's two for the price so it's even better
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Reviewed in the United States on January 5, 2026
★★★★★ 5
Simple and Effective for Fresher Breath!
I decided to try these stainless steel tongue scrapers, and I'm glad I did. You get a pack of two, which is convenient. They feel really sturdy, being made of surgical steel, and they are easy to clean. I've noticed a difference in how fresh my mouth feels since I started using them. It's a simple addition to my oral hygiene routine, but it seems to make a real impact on breath freshness. If you're looking for a durable and effective tongue cleaner, this two-pack is a good option.
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Reviewed in the United States on June 2, 2025