Xiaoyudou Exhaust Mount Bushing Kit M136109K for Peterbilt 348/379/388/389 — Poly Bushings & Hardware

The Xiaoyudou M136109K exhaust mount bushing kit secures and cushions heavy-duty truck exhausts for Peterbilt 348/379/388/389 and Kenworth T600/T680/T800/W900 models.

This replacement kit supplies the hardware needed to stabilize an under-vehicle exhaust assembly, reducing rattles and movement while protecting mounting points from wear. Designed to tolerate engine heat, road vibration, and exposure to oils and salts, the kit includes an exhaust mount with poly bushings plus shafting and fasteners; Xiaoyudou backs it with a two-year warranty for added confidence. Below are practical answers to common buyer questions to help determine fit, function and installation considerations.

How does this kit improve exhaust stability on heavy trucks?

The kit replaces worn rubber mounts with a reinforced mount and poly bushings that resist deformation and degradation from heat and chemicals. That results in firmer support for the exhaust system, fewer vibrations transmitted to the chassis, and extended service life for related components.

• Includes a stamped exhaust mount to hold pipe position reliably.
• Poly bushings resist oil, salt, and high exhaust temperatures.
• Hardware (shaft, washers, E-clips) ensures secure assembly and prevents slippage.

Will this fit my truck — which models are compatible?

The kit is made to fit a range of popular Class 8 models from two major manufacturers. Confirm your truck’s mount dimensions and part interchangeability before purchase, but the kit targets common factory mounting styles used on these chassis.

• Compatible with Peterbilt 348, 379, 388, 389 models.
• Also fits Kenworth T600, T680, T800, W900 variants.
• Designed for the mounting configurations typical of these model lines.

What parts are included and what should I expect during installation?

The package supplies a ready-to-install mount assembly with the bushings already paired with shafting and retaining hardware to simplify replacement. Installation generally requires basic hand tools, a safe jacking or lift procedure, and moderate mechanical skill to remove the old assembly and align the new mount properly.

• One exhaust mount with poly bushing(s) included in the kit.
• One shaft, two washers, and two E-clips for secure fastening.
• Typical installation needs hand tools and safe vehicle support; torque to manufacturer specs.

How durable is the Xiaoyudou M136109K compared with OEM rubber mounts?

Xiaoyudou uses engineered polymer bushings and robust mounting hardware intended to outlast conventional rubber by resisting heat soak and chemical attack. The improved materials and construction reduce frequent replacements and roadside failures common with degraded rubber mountings.

• Polymer bushing material resists cracking from heat and fluids.
• Stamped mount and metal shaft reduce bending and wear under load.
• Two-year warranty covers defects, offering extra protection for fleet use.

Who this is for: The M136109K kit is aimed at truck owners, fleet maintenance teams, and technicians who need a resilient, cost-effective replacement for exhaust mounting hardware on Peterbilt and Kenworth heavy-duty rigs. If you’re maintaining an older rig subject to vibration, heat, or corrosive road conditions and want to reduce exhaust movement and repair frequency, this kit provides a straightforward parts swap with durable materials and warranty support.