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  • Peterbilt 389 8" Dynaflex Chrome Exhaust Kit OEM Style Elbow With Exhaust Stack Options
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Peterbilt 389 8" Dynaflex Chrome Exhaust Kit OEM Style Elbow

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Product Description


Peterbilt 389 Unibilt Sleeper 8" Dynaflex Chrome Exhaust Kit - OEM Style Elbow (Does Not Fit Day Cab)

*Kit Is Designed To Be Installed On Trucks With DPF; If You Do Not Have A DPF, Please Call Before Purchasing

*Will Not Work On 389 Short Hoods. Please see our 389 Short Hood Listing For That Truck


Premier Quality Stacks With A Look That Is Unmatched!

  • OEM Style Multi-Bend Elbows That Exactly Replace Factory Elbows
  • Fits 2011-2017 Peterbilt 389 Models With Unibilt Sleeper - Will Not Fit Day Cabs
  • Kit Includes Stacks, Spools, & Appropriate Clamps & Brackets Required
  • All Clamps & Brackets For Underneath The Truck Are Sold Separately
  • Uses Patented Taper Lock Design
  • Quality American Made Product

Need Help Selecting Your Stack Length? View Dynaflex Top Stack Height Chart

*68" Top Stacks Will Equal A Total Of 14' Off The Ground! Buy With Caution! Calculation Based Off Of The Average Truck's Top Bracket Being 100" Off The Ground.

The 8" Dynaflex chrome exhaust kit with OEM style elbows is designed to fit Peterbilt 389 models with a unibuilt sleeper built in 2011 to 2017. It will NOT fit day cab models. The OEM style multi-bend elbow will replace the factory elbows. The kit includes stacks, spools, and appropriate clamps and brackets required. 

The fixed shipping price on Dynaflex exhaust kits is for commercial addresses within the 48 contiguous United States. Shipping to a residential address or farm will require a $100 shipping fee. Shipping to anywhere else within the U.S or Canada will be subject to a charge based on address and weight of package.


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