Peterbilt 386 DPF & Mufflers
Replace your muffler no problem with Peterbilt 386 aftermarket mufflers and easy ordering from 4 State Trucks. Shop our inventory of custom, chrome, and aftermarket mufflers. We have Peterbilt mufflers that will perfectly fit your big rig and budget.
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BESTfit 7 Inch OD X 45 Inch VK Internal Muffler Pipe
BESTFIT TRUCK PARTS
$625.99BESTfit 7 Inch OD X 45 Inch VK Internal Muffler PipeElevate your vehicle's performance with our top-of-the-line Muffler, designed to deliver unparalleled sound control and airflow optimization. Featuring a generous 7-inch diameter and a 45-inch length,...$625.99 -
BESTfit 6 Inch OD X 45 Inch VK Internal Muffler Pipe
BESTFIT TRUCK PARTS
$690.99BESTfit 6 Inch OD X 45 Inch VK Internal Muffler PipeExperience unparalleled performance with our premium Muffler, meticulously crafted for exceptional sound control and optimized airflow. Boasting a 6-inch diameter and a 45-inch length, this aftermarket...$690.99 -
BESTfit 5 Inch OD X 45 Inch VK Internal Muffler Pipe
BESTFIT TRUCK PARTS
$724.99BESTfit 5 Inch OD X 45 Inch VK Internal Muffler PipeEnhance your vehicle's performance with our top-of-the-line Muffler, designed for superior sound reduction and optimal airflow. This aftermarket replacement part features a 5-inch diameter and a length...$724.99 -
BESTfit 6 X 29 Inch Aluminized Steel Quiet Performance Muffler W/ 4 Inch Inlet/Outlet
BESTFIT TRUCK PARTS
$622.99BESTfit 6 X 29 Inch Aluminized Steel Quiet Performance Muffler W/ 4 Inch Inlet/OutletConstructed from robust Aluminized Steel, this aftermarket muffler ensures durability and longevity for your vehicle's exhaust system. It comes with mounting hardware...$622.99 -
BESTfit 10 X 49.5 Inch Type 1 Muffler W/ Lifting Ring W/ 5 Inch Inlet/Outlet Replaces M66-6188, M101451 For PACCAR
BESTFIT TRUCK PARTS
$699.99BESTfit Aluminized Steel Type 1 Muffler Fits Keworth & PeterbiltEnhance your vehicle's performance with our Aluminized Steel Muffler, proudly made in the USA. Featuring a sturdy construction, it measures 10 inches in diameter and 49.5 inches in length,...$699.99 -
BESTfit 5 X 18 Inch 16 Gauge Aluminized Steel Internal Muffler
BESTFIT TRUCK PARTS
$69.76BESTfit 5 X 18 Inch 16 Gauge Aluminized Steel Internal Muffler * High Quality Internal Muffler* Aluminized Steel* 16 Gauge* Dimensions- 5 Inch Diameter- 18 Inch Length* Works Well With 36 Inch Stacks* Hardware Not Included* Sold Individually* Warranty On...$69.76 -
BESTfit 4 X 18 Inch 16 Gauge Aluminized Steel Internal Muffler
BESTFIT TRUCK PARTS
$64.66BESTfit 4 X 18 Inch 16 Gauge Aluminized Steel Internal Muffler * High Quality Internal Muffler* Aluminized Steel * 16 Gauge* Dimensions- 4 Inch Diameter- 18 Inch Length* Works Well With 36 Inch Stacks* Hardware Not Included* Sold Individually* Warranty...$64.66 -
BESTfit 4 Inch In X 5 Inch Out X 8 X 21 Inch Aluminized Steel Type 1 Muffler
BESTFIT TRUCK PARTS
$131.99BESTfit 4 Inch In X 5 Inch Out X 8 X 21 Inch Aluminized Steel Type 1 Muffler * High Quality Muffler* Aluminized Steel* Dimensions- 4 Inch Inside Diameter- 5 Inch Inside Diameter- 8 Inch Body Diameter- 15 Inch Body Length- 21 Inch Over All Length* Angle...$131.99 -
BESTfit 8 X 30 Inch OAL Exhaust Muffler With 5 Inch I.D. Inlet & Outlet
BESTFIT TRUCK PARTS
$145.99BESTfit Muffler 8 Inch Diameter * High Quality Muffler* Aluminized* Dimensions- 8 Inch Diameter- 5 Inch I.D. Inlet/Outlet- 24 Inch Length Body- 30 Inch Length Overall* Sold Individually* Warranty On Mufflers Against Defects In Workmanship & Material From...$145.99 -
BESTfit 10 X 51.5 Inch Performance Muffler
BESTFIT TRUCK PARTS
$179.99BESTfit 51.5 Inch Performance Sport Muffler * High Quality Muffler* 51.5 Inch Wide Muffler Is 1 Inch Wider Than The Standard Performance Sport * Uses Acoustic Louver Sound Dampening* Up To 50 Additional Horsepower And Improved Response* Lower Exhaust Gas...$179.99