Description
The ATRO KT75-61257 is a complete cab-to-sleeper mount isolation kit engineered for Peterbilt conventionals with Unibilt cab/sleeper assemblies. This kit includes the mounting bracket, elastomer isolators, and fastening hardware needed for a complete replacement. The polyurethane isolation system reduces cab vibration transmission to the sleeper compartment, improving driver rest and comfort on long hauls.
Specifications
| Manufacturer | ATRO Engineered Systems |
|---|---|
| Part Number | KT75-61257 |
| Kit Type | Cab-Sleeper Mount Kit |
| Mount Material | Steel, painted |
| Isolator Material | Polyurethane |
| Contents | Bracket, isolators, fasteners (bolts not included – see Peterbilt 20-08867 sleeve) |
Cross References
This part replaces or is equivalent to the following part numbers:
- Peterbilt: 20-08257 (mount bracket)
- Peterbilt: 20-08867 (sleeve – sold separately)
- Gaff: GAFF12360 (near cross, no bolts included)
Applications
This cab-sleeper mount kit fits the following Peterbilt Unibilt models:
- Peterbilt 357 (1987-2004)
- Peterbilt 365 (1987-2004)
- Peterbilt 378 (1987-2004)
- Peterbilt 379 (1987-2004)
- Peterbilt 385 (1987-2004)
- Peterbilt 389 (1987-2004)
Verify mount configuration and cab/sleeper interface before ordering. Mounting bolts sold separately – see Peterbilt 20-08867 sleeve for complete assembly.









