Peterbilt 357/378 DPF & Mufflers

Peterbilt 357/378 DPF & Mufflers

Peterbilt 357/378 DPF & Mufflers

Time to replace or upgrade your muffler? Shop 4 State Trucks' collection of Peterbilt 378 aftermarket mufflers. We have custom, chrome, and aftermarket mufflers. Find the perfect muffler that fits your style and budget at 4 State Trucks.
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  • BESTfit 10 X 51.5 Inch Performance Muffler
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    BESTfit 10 X 51.5 Inch Performance Muffler

    BESTFIT TRUCK PARTS

    $179.99
    BESTfit 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
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