Peterbilt 357/378 Exhaust Kits

Peterbilt 357/378 Exhaust Kits

Peterbilt 357/378 Exhaust Kits

Make upgrading your exhaust a breeze with Peterbilt 378 aftermarket exhaust kits. Shop for custom, chrome, and aftermarket exhaust kits, designed to fit your Peterbilt. We have exhaust kits and parts that will fit your big rig and budget.
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  • On Sale
    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  West Coast Turn Top Stack  Long 90S & Chrome Tapered Y-Pipe 5 Inch Taper Lock Chrome Tee Peterbilt (1987-2003) 52 Inch Standard Spool Non-Unibilt BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  West Coast Turn Top Stack  Long 90S & Chrome Tapered Y-Pipe 5 Inch Taper Lock Chrome Tee Peterbilt (1987-2003) 52 Inch Standard Spool Non-Unibilt
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    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/ West Coast Turn Top Stack Long 90S & Chrome Tapered Y-Pipe 5 Inch Taper Lock Chrome Tee Peterbilt (1987-2003) 52 Inch Standard Spool Non-Unibilt

    BESTFIT TRUCK PARTS

    Now: $3,645.89
    Was: $4,050.99
    Chrome 8 Inch Exhaust Kit With 55 Inch Spool, Long Drop Elbows & 5 Inch T Pipe  - Exhaust Kit  - Chrome-Plated Steel - Length 120 Inch - (2) Chrome Long Leg 8 Inch Elbow With Tapered Top Reduced To 5 Inch O.D. Bottom - (1) Y Pipe...
    Now: $3,645.89
    Was: $4,050.99
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    Now: $3,645.89
    Was: $4,050.99
    Subtotal:
  • On Sale
    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Miter Cut Top Stack  Long 90S & Chrome Tapered Y-Pipe 5 Inch Taper Lock Chrome Tee Peterbilt (2005-Newer) 55 Inch Standard Spool Unibilt BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Miter Cut Top Stack  Long 90S & Chrome Tapered Y-Pipe 5 Inch Taper Lock Chrome Tee Peterbilt (2005-Newer) 55 Inch Standard Spool Unibilt
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    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/ Miter Cut Top Stack Long 90S & Chrome Tapered Y-Pipe 5 Inch Taper Lock Chrome Tee Peterbilt (2005-Newer) 55 Inch Standard Spool Unibilt

    BESTFIT TRUCK PARTS

    Now: $3,711.59
    Was: $4,123.99
    Chrome 8 Inch Exhaust Kit With 55 Inch Spool, Long Drop Elbows & 5 Inch T Pipe  - Exhaust Kit  - Chrome-Plated Steel - Length 120 Inch - (2) Wide Angled Clamp 8 Inch Chrome-Plated Stainless Steel - (2) Exhaust Mount Grommets Pack...
    Now: $3,711.59
    Was: $4,123.99
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    Qty in Cart: 0
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    Price:
    Now: $3,711.59
    Was: $4,123.99
    Subtotal:
  • On Sale
    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Bull Hauler Turn Top Stack  Long 90S & Chrome Tapered Y-Pipe 8 Inch Taper Lock Chrome Tee Peterbilt (2005-Newer) 55 Inch Standard Spool Non-Unibilt BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Bull Hauler Turn Top Stack  Long 90S & Chrome Tapered Y-Pipe 8 Inch Taper Lock Chrome Tee Peterbilt (2005-Newer) 55 Inch Standard Spool Non-Unibilt
    Add to Cart

    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/ Bull Hauler Turn Top Stack Long 90S & Chrome Tapered Y-Pipe 8 Inch Taper Lock Chrome Tee Peterbilt (2005-Newer) 55 Inch Standard Spool Non-Unibilt

    BESTFIT TRUCK PARTS

    Now: $4,180.49
    Was: $4,644.99
    Chrome 8 Inch Exhaust Kit With 55 Inch Spool, Long Drop Elbows & 5 Inch T Pipe  - Exhaust Kit  - Chrome-Plated Steel - Length 120 Inch - (2) Chrome Long Leg 8 Inch Elbow With Tapered Top 8 Inch O.D. Bottom - (1) 8-5 Taper Lock...
    Now: $4,180.49
    Was: $4,644.99
    Add to Cart
    Qty in Cart: 0
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    Price:
    Now: $4,180.49
    Was: $4,644.99
    Subtotal:
  • On Sale
    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Bull Hauler Turn Top Stack  OE Style Elbows  Peterbilt (1987-2003) 52 Inch Standard Spool Non-Unibilt BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Bull Hauler Turn Top Stack  OE Style Elbows  Peterbilt (1987-2003) 52 Inch Standard Spool Non-Unibilt
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    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/ Bull Hauler Turn Top Stack OE Style Elbows Peterbilt (1987-2003) 52 Inch Standard Spool Non-Unibilt

    BESTFIT TRUCK PARTS

    Now: $2,998.79
    Was: $3,331.99
    Chrome 8 Inch Exhaust Kit With 52 Inch Spool & 58 Degree Elbow  - Made Of High Quality Chrome-Plated Steel - Length 120 Inch - 2- 01-081853056- 8-5 58-Dg Chrome Elbow With Tapered Top For O.D. Stacks 8 Inch Elbow Reduces To 5 Inch O.D. On...
    Now: $2,998.79
    Was: $3,331.99
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $2,998.79
    Was: $3,331.99
    Subtotal:
  • On Sale
    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Bull Hauler Turn Top Stack  Long Drop Elbows No Tee Peterbilt (1987-2003) 52 Inch Standard Spool Unibilt BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Bull Hauler Turn Top Stack  Long Drop Elbows No Tee Peterbilt (1987-2003) 52 Inch Standard Spool Unibilt
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    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/ Bull Hauler Turn Top Stack Long Drop Elbows No Tee Peterbilt (1987-2003) 52 Inch Standard Spool Unibilt

    BESTFIT TRUCK PARTS

    Now: $3,500.99
    Was: $3,889.99
    Chrome 8 Inch Exhaust Kit With 52 Inch Spool & Long Drop 90 Degree Elbows  - Exhaust Kit  - Chrome-Plated Steel - Length 120 Inch - (2) Wide Angled Clamp 8 Inch Chrome-Plated Stainless Steel - (2) Exhaust Mount Grommets Pack Of 4...
    Now: $3,500.99
    Was: $3,889.99
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    Qty in Cart: 0
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    Price:
    Now: $3,500.99
    Was: $3,889.99
    Subtotal:
  • On Sale
    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Miter Cut Top Stack  Long Drop Elbows No Tee Peterbilt (2005-Newer) 55 Inch Standard Spool Non-Unibilt BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Miter Cut Top Stack  Long Drop Elbows No Tee Peterbilt (2005-Newer) 55 Inch Standard Spool Non-Unibilt
    Add to Cart

    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/ Miter Cut Top Stack Long Drop Elbows No Tee Peterbilt (2005-Newer) 55 Inch Standard Spool Non-Unibilt

    BESTFIT TRUCK PARTS

    Now: $3,167.09
    Was: $3,518.99
    Chrome 8 Inch Exhaust Kit With 55 Inch Spool & Long Drop 90 Degree Elbows  - Exhaust Kit  - Kit Includes:  - (2) 8 O.D. X 68 Miter Cut Chrome Top Stack  - (2) Exhaust Spool 8 Inch O.D. X 55 Inch Chrome Tapered Top  - (2) Chrome...
    Now: $3,167.09
    Was: $3,518.99
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $3,167.09
    Was: $3,518.99
    Subtotal:
  • On Sale
    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Bull Hauler Turn Top Stack  OE Style Elbows  Peterbilt (2005-Newer) 55 Inch Standard Spool Non-Unibilt BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Bull Hauler Turn Top Stack  OE Style Elbows  Peterbilt (2005-Newer) 55 Inch Standard Spool Non-Unibilt
    Add to Cart

    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/ Bull Hauler Turn Top Stack OE Style Elbows Peterbilt (2005-Newer) 55 Inch Standard Spool Non-Unibilt

    BESTFIT TRUCK PARTS

    Now: $2,998.79
    Was: $3,331.99
    Chrome 8 Inch Exhaust Kit With 55 Inch Spool & 58 Degree Elbow  - Made Of High Quality Chrome-Plated Steel - Length 120 Inch - 2- 01-081853056- 8-5 58-Dg Chrome Elbow With Tapered Top For O.D. Stacks 8 Inch Elbow Reduces To 5 Inch O.D. On...
    Now: $2,998.79
    Was: $3,331.99
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $2,998.79
    Was: $3,331.99
    Subtotal:
  • On Sale
    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Miter Cut Top Stack  Long 90S & Chrome Tapered Y-Pipe 8 Inch Taper Lock Chrome Tee Peterbilt (1987-2003) 52 Inch Standard Spool Unibilt BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Miter Cut Top Stack  Long 90S & Chrome Tapered Y-Pipe 8 Inch Taper Lock Chrome Tee Peterbilt (1987-2003) 52 Inch Standard Spool Unibilt
    Add to Cart

    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/ Miter Cut Top Stack Long 90S & Chrome Tapered Y-Pipe 8 Inch Taper Lock Chrome Tee Peterbilt (1987-2003) 52 Inch Standard Spool Unibilt

    BESTFIT TRUCK PARTS

    Now: $4,085.99
    Was: $4,539.99
    Chrome 8 Inch Exhaust Kit With 52 Inch Spool, Long Drop Elbows & 5 Inch T Pipe  - Exhaust Kit - Made Of Chrome-Plated Steel - Length 120 Inch - (2) Wide Angled Clamp 8 Inch Chrome-Plated Stainless Steel - (2) Exhaust Mount...
    Now: $4,085.99
    Was: $4,539.99
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $4,085.99
    Was: $4,539.99
    Subtotal:
  • On Sale
    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Bull Hauler Turn Top Stack  Long 90S & Chrome Tapered Y-Pipe 5 Inch Taper Lock Chrome Tee Peterbilt (1987-2003) 52 Inch Standard Spool Unibilt BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Bull Hauler Turn Top Stack  Long 90S & Chrome Tapered Y-Pipe 5 Inch Taper Lock Chrome Tee Peterbilt (1987-2003) 52 Inch Standard Spool Unibilt
    Add to Cart

    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/ Bull Hauler Turn Top Stack Long 90S & Chrome Tapered Y-Pipe 5 Inch Taper Lock Chrome Tee Peterbilt (1987-2003) 52 Inch Standard Spool Unibilt

    BESTFIT TRUCK PARTS

    Now: $3,841.19
    Was: $4,267.99
    Chrome 8 Inch Exhaust Kit With 52 Inch Spool, Long Drop Elbows & 5 Inch T Pipe  - Exhaust Kit - Made Of Chrome-Plated Steel - Length 120 Inch - (2) Wide Angled Clamp 8 Inch Chrome-Plated Stainless Steel - (2) Exhaust Mount...
    Now: $3,841.19
    Was: $4,267.99
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $3,841.19
    Was: $4,267.99
    Subtotal:
  • On Sale
    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Miter Cut Top Stack  Long 90S & Chrome Tapered Y-Pipe 5 Inch Taper Lock Chrome Tee Peterbilt (2005-Newer) 55 Inch Standard Spool Non-Unibilt BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Miter Cut Top Stack  Long 90S & Chrome Tapered Y-Pipe 5 Inch Taper Lock Chrome Tee Peterbilt (2005-Newer) 55 Inch Standard Spool Non-Unibilt
    Add to Cart

    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/ Miter Cut Top Stack Long 90S & Chrome Tapered Y-Pipe 5 Inch Taper Lock Chrome Tee Peterbilt (2005-Newer) 55 Inch Standard Spool Non-Unibilt

    BESTFIT TRUCK PARTS

    Now: $3,687.29
    Was: $4,096.99
    Chrome 8 Inch Exhaust Kit With 52 Inch Spool, Long Drop Elbows & 5 Inch T Pipe  - Exhaust Kit  - Chrome-Plated Steel - Length 120 Inch - (2) Chrome Long Leg 8 Inch Elbow With Tapered Top Reduced To 5 Inch O.D. Bottom - (1) Y Pipe...
    Now: $3,687.29
    Was: $4,096.99
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $3,687.29
    Was: $4,096.99
    Subtotal:
  • On Sale
    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Miter Cut Top Stack  OE Style Elbows  Peterbilt (1987-2003) 52 Inch Standard Spool Unibilt BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Miter Cut Top Stack  OE Style Elbows  Peterbilt (1987-2003) 52 Inch Standard Spool Unibilt
    Add to Cart

    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/ Miter Cut Top Stack OE Style Elbows Peterbilt (1987-2003) 52 Inch Standard Spool Unibilt

    BESTFIT TRUCK PARTS

    Now: $3,095.99
    Was: $3,439.99
    Chrome 8 Inch Exhaust Kit With 52 Inch Spool & 58 Degree Elbow  - Made Of High Quality Chrome-Plated Steel - Length 120 Inch - 2- 01-0800800- Wide Angled Clamp 8 Inch Chrome-Plated Stainless Steel - 2- 01-0800003- Exhaust Mount...
    Now: $3,095.99
    Was: $3,439.99
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $3,095.99
    Was: $3,439.99
    Subtotal:
  • On Sale
    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Miter Cut Top Stack  Long 90S & Chrome Tapered Y-Pipe 8 Inch Taper Lock Chrome Tee Peterbilt (2005-Newer) 55 Inch Standard Spool Unibilt BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/  Miter Cut Top Stack  Long 90S & Chrome Tapered Y-Pipe 8 Inch Taper Lock Chrome Tee Peterbilt (2005-Newer) 55 Inch Standard Spool Unibilt
    Add to Cart

    BESTfit 8-5 X 120 Inch Chrome Exhaust Kit W/ Miter Cut Top Stack Long 90S & Chrome Tapered Y-Pipe 8 Inch Taper Lock Chrome Tee Peterbilt (2005-Newer) 55 Inch Standard Spool Unibilt

    BESTFIT TRUCK PARTS

    Now: $4,085.99
    Was: $4,539.99
    Chrome 8 Inch Exhaust Kit With 55 Inch Spool, Long Drop Elbows & 5 Inch T Pipe  - Exhaust Kit  - Chrome-Plated Steel - Length 120 Inch - (2) Wide Angled Clamp 8 Inch Chrome-Plated Stainless Steel - (2) Exhaust Mount Grommets Pack...
    Now: $4,085.99
    Was: $4,539.99
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $4,085.99
    Was: $4,539.99
    Subtotal:
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