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#STFPETSA525 Free Shipping!!! Fits 2006 and newer Peterbilt 389,386, and late 379. Black ABS Plastic. Includes hardware and speaker wire harness.  Hole opening is 4 3/4. Bolts to original speaker mount holes with included hardware. Trimming of the original headliner inside the speaker hole is required. Fits flattop and ultracab trucks. #stfp06525ad

5.25 Speaker Adapter Peterbilt

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