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8C-9129 | Caterpillar® Rod Buffer Step Seal 4.000" - Teflon/Nitrile

Marsoni M251S
Sale price$78.53
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8C-9129 | Caterpillar® Rod Buffer Step Seal 4.000" - Teflon/NitrileProduct Details : 8C 9129 Caterpillar Rod Buffer Step Seal 4. 000" Teflon Nitrile Part No: RCAT 8C9129 Caterpillar Reference No.: 8C 9129 Product Category: Rod Seals Product Type: Rod Buffer Step Seal Profile: CAT Material(s): Teflon Nitrile Material Code: PTFE NBR Temperature Range: 30F to +230F ( 34C to +110C) Pressure Range: 5800 PSI ( 400 Bar) Surface Speed: < 13 ft s (4 m s) System Of Measurement: Inch Rod Diameter: 4. 000" Dimensions: 4. 000" x
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ODSteve
Pawtucket, US
★★★★★ 5
Amazing fit and price
Works great every time!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 10, 2025
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Verified Purchase
Colin W.
Louisville, US
★★★★★ 5
Great replacement filters
I’m onto round 2, almost due for round three of filter and oil changes on my eco diesel JL and so far these have worked great because i refuse to pay $50 for just an oil filter. No oil pressure issues with the oil filters and fuel filters prime and work as they should.
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Reviewed in the United States on March 2, 2025
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kelly clark
West Palm Beach, US
★★★★★ 5
Perfect fit for 2020 jeep eco diesel
Send set 8 have used, on my 2020 Jeep Wrangler Rubicon with Eco Diesel.
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Reviewed in the United States on May 15, 2026
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Randy A. Eastridge
Boise, US
★★★★★ 5
On time shipping
What I need when I need it
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Reviewed in the United States on May 7, 2026
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Verified Purchase
JSN
Lexington, US
★★★★★ 1
Oil pressure drop
Once the engine warms up, the oil pressure drops enough to trigger the check engine light every time it dips below the threshold. I decided to try an aftermarket oil filter, but it looks like I’ll be switching back to the pricey OEM one after all.
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Reviewed in the United States on December 14, 2025

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