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Gates · Cooling System
25-120911HD
In stock · ships from Knoxville
This is a heavy-duty serpentine belt for Class 8 trucks and other large diesel applications.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 10 applications
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All confirmed applications for this part number.
International
Peterbilt
International
Peterbilt
Fitment derived from Gates K120911HD cross‑reference. Always verify with your engine serial number and belt routing diagram before purchasing.
Part data verified against 3 catalog sources
Numbers this part supersedes or interchanges with. Showing 16 of 35.
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It drives multiple engine accessories such as the alternator, fan, and A/C compressor. You replace it when you see cracking, glazing, or fraying, or as part of scheduled maintenance to avoid a sudden breakdown on the road. It uses EPDM rubber with polyester cords for long life and resistance to heat and wear under extreme engine‑bay conditions.
Part Number: 25-120911HD
HD BELT
Dealer: Knox Trailers
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