Contact Us Live Chat or 1-888-220-8330
Search Bar
Search by Part Number or Keywords
  • My Garage
  • My Account
  • Cart
  • Body & Mirrors
  • Chassis & Brakes
  • Engine & Drivetrain
  • Electrical & Lighting
Help Center
< Back ×
  • Body & Mirrors
  • Chassis & Brakes
  • Engine & Drivetrain
  • Electrical & Lighting
Login/Register My Account Track Order Help Center Contact Us
Replacement and OEM Parts for 2003 Infiniti QX4 Muffler

2003 Infiniti QX4 Muffler

My Vehicle Change Vehicle
2003 Infiniti QX4
Change Vehicle
Vehicle Options
We need more information about your vehicle to make a correct determination of fitment
< Back to View All
Exhaust Manifolds, Pipes & Mufflers
  • Department
  • Body Length
  • Inlet Configuration
  • Material
  • Outlet Configuration
  • Shape
  • Brands
  • Prices

6 Products found

Show Item:
  • 30
  • 60
  • 90
Sort by:
Recommended
Filter
Sort
View by
  • OEM 2003 Infiniti QX4 Muffler Assy-Exhaust Main Diagram - 20100-5W015
    View Related Parts

    OEM (Genuine) 2003 Infiniti QX4 Muffler Assy-Exhaust Main

    PartNumber: 20100-5W015
    OEM 2003 Infiniti QX4 Muffler Assy-Exhaust Main - 20100-5W015
    Product Specifications
    • Notes: 2001-03, W/4WD;2001-03, W/O 4WD
    • Other Names: Muffler
    • Item Dimensions: 67.3 x 37.8 x 13.3 inches
    • Item Weight: 35.00 Pounds
    • Replaces: 20100-5W002, 20100-5W014, 20100-5W000, 20100-5W012, 20100-5W01E, 20100-5W010, 20100-5W004
    • Part Description: Muffler Assy-Exhaust Main
    More Info
    $798.72 MSRP: $1095.65
    You Save: $296.93 (28%)
  • Walker Soundfx Front Aluminized Steel Oval Direct Fit Exhaust Muffler for 2003 Infiniti QX4 - 18963

    Walker® Soundfx Front Aluminized Steel Oval Direct Fit Exhaust Muffler for 2003 Infiniti QX4

    PartNumber: 18963
    Product Specifications
    • Notes: If welded Assy, replace all Reqd parts; Optional; SoundFX for 54377
    • Body Height: 5.500
    • Body Length: 18.000
    • Body Material: Steel
    • Body Width: 11.000
    • Finish: Aluminized
    • Grade Type: Regular
    • Inlet 1 Inside Diameter: 1.750
    • Inlet 1 Type: Pipe Connection
    • Inlet 2 Inside Diameter: 1.750
    • Inlet 2 Type: Pipe Connection
    • Inlet Configuration: Dual
    • Inlet Offset: 1.5
    • Internet Product Code (IPC): A021B8B9135
    • Item has MSDS (SDS): N
    • Max Year Covered: 2004
    • MFG Brand Name: Walker Exhaust
    • MFG Model # (Series): 18963
    • MFG Name: Tenneco, Inc
    • Min Year Covered: 2001
    • Most Popular Make / Model: Nissan Pathfinder
    • Most Popular Year: 2001
    • Muffler Body Height: 5.5
    • Muffler Body Length: 18.0
    • Muffler Body Material: Steel
    • Muffler Body Width: 11.0
    • Muffler Color / Finish: Aluminized
    • Muffler Inlet: Dual Inlet - Offset
    • Muffler Inlet Connection Type: Pipe Connection
    • Muffler Inlet Count: 2
    • Muffler Inlet Diameter (in): 1.75
    • Muffler Inlet Diameter Designation: Inside Diameter
    • Muffler Outlet: Offset
    • Muffler Outlet Connection Type: 2-Bolt Welded Flange
    • Muffler Outlet Count: 1
    • Muffler Outlet Diameter (in): 2.0
    • Muffler Outlet Diameter Designation: Outside Diameter
    • Muffler Overall Length: 39.5
    • Muffler Reversible: No
    • Muffler Shape: Oval
    • Outlet Configuration: Offset
    • Overall Length: 39.500
    • Product Grade: Economy
    • Reversible: No
    • Shape: Oval
    • Supplier Company Name: Tenneco, Inc
    • Total Part VIO: 158500
    • Universal Or Specific Fit: Specific
    • UPC: 086387189637
    • Part Description: Soundfx Front Aluminized Steel Oval Direct Fit Exhaust Muffler
    More Info
    $87.13
  • Bosal Rear Exhaust Muffler for 2003 Infiniti QX4 - 278-713

    Bosal® Rear Exhaust Muffler for 2003 Infiniti QX4

    PartNumber: 278-713
    Product Specifications
    • Exhaust Component Mount Type: Uses New Hangers (Included)
    • Inlet Flange Bolt Hole Quantity: 2
    • Internet Product Code (IPC): 60E69409117
    • Item has MSDS (SDS): No
    • MFG Brand Name: Bosal
    • MFG Model # (Series): 278-713
    • Muffler Body Height (in): 6.1
    • Muffler Body Length: 10.61
    • Muffler Body Material: Aluminized Steel
    • Muffler Color/Finish: Aluminized
    • Muffler Inlet: Centered
    • Muffler Inlet Connection Type: Flange Connection
    • Muffler Inlet Count: 1
    • Muffler Inlet Diameter (in): 2.03
    • Muffler Inlet Diameter Designation: Inside Diameter
    • Muffler Outlet: Centered
    • Muffler Outlet Connection Type: Pipe Connection
    • Muffler Overall Length (in): 49.0
    • Muffler Reversible: No
    • Muffler Shape: Oval
    • Muffler Type: Reflection
    • Pipe Material: Aluminized Steel
    • Resonator Shape: Round
    • Series: Direct-Fit Exhaust
    • Supplier Company Name: Bosal
    • UPC: 623920308157
    • Part Description: Rear Exhaust Muffler
    More Info
    $121.36
  • OEM 2003 Infiniti QX4 Post Muffler Assembly Diagram - 20350-4W020
    View Related Parts

    OEM (Genuine) 2003 Infiniti QX4 Post Muffler Assembly

    PartNumber: 20350-4W020
    OEM 2003 Infiniti QX4 Post Muffler Assembly - 20350-4W020
    Product Specifications
    • Notes: 2001-03
    • Other Names: Muffler, Resonator
    • Item Dimensions: 49.4 x 9.9 x 9.9 inches
    • Item Weight: 13.00 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 20350-4W01A, 20350-4W010
    • Part Description: Post Muffler Assembly
    More Info
    $306.30 MSRP: $420.18
    You Save: $113.88 (28%)
  • Walker Quiet Flow Rear Stainless Steel Round Aluminized Exhaust Muffler And Pipe Assembly for 2003 Infiniti QX4 - 54378

    Walker® Quiet Flow Rear Stainless Steel Round Aluminized Exhaust Muffler And Pipe Assembly for 2003 Infiniti QX4

    PartNumber: 54378
    Product Specifications
    • Notes: Premium - Limited Lifetime Warranty
    • Body Height: 5.000
    • Body Length: 12.000
    • Body Material: Stainless Steel
    • Body Width: 5.000
    • Exhaust Component Mount Type: Uses Factory Hangers
    • Finish: Aluminized
    • Grade Type: Regular
    • Inlet 1 Outside Diameter: 2.100
    • Inlet 1 Type: 2 Bolt Welded Flange
    • Inlet Configuration: Center
    • Internet Product Code (IPC): 9903A28C6B5
    • Item has MSDS (SDS): N
    • Max Year Covered: 2004
    • MFG Brand Name: Walker Exhaust
    • MFG Model # (Series): 54378
    • MFG Name: Tenneco, Inc
    • Min Year Covered: 2001
    • Most Popular Make / Model: Nissan Pathfinder
    • Most Popular Year: 2001
    • Muffler Body Height: 5
    • Muffler Body Length: 12
    • Muffler Body Material: Stainless Steel
    • Muffler Body Width: 5
    • Muffler Color / Finish: Bare
    • Muffler Inlet: Centered
    • Muffler Inlet Connection Type: 2-Bolt Welded Flange
    • Muffler Inlet Count: 1
    • Muffler Inlet Diameter Designation: Outside Diameter
    • Muffler Outlet: Centered
    • Muffler Outlet Connection Type: Pipe Connection
    • Muffler Outlet Count: 1
    • Muffler Outlet Diameter (in): 2.25
    • Muffler Outlet Diameter Designation: Outside Diameter
    • Muffler Overall Length: 46.55
    • Muffler Reversible: No
    • Muffler Shape: Round
    • Outlet 1 Outside Diameter: 2.250
    • Outlet Configuration: Center
    • Overall Length: 46.500
    • Product Grade: Economy
    • Shape: Round
    • Supplier Company Name: Tenneco, Inc
    • Total Part VIO: 158500
    • UPC: 086387543781
    • Part Description: Quiet Flow Rear Stainless Steel Round Aluminized Exhaust Muffler And Pipe Assembly
    More Info
    $75.14
  • Walker Soundfx Rear Aluminized Steel Round Direct Fit Exhaust Muffler for 2003 Infiniti QX4 - 18962

    Walker® Soundfx Rear Aluminized Steel Round Direct Fit Exhaust Muffler for 2003 Infiniti QX4

    PartNumber: 18962
    Product Specifications
    • Notes: optional; SoundFX for 54378
    • Body Height: 5.000
    • Body Length: 12.000
    • Body Material: Steel
    • Body Width: 5.000
    • Finish: Aluminized
    • Grade Type: Regular
    • Inlet 1 Type: 2 Bolt Welded Flange
    • Inlet Configuration: Center
    • Internet Product Code (IPC): 94A21ACA976
    • Item has MSDS (SDS): N
    • Max Year Covered: 2004
    • MFG Brand Name: Walker Exhaust
    • MFG Model # (Series): 18962
    • MFG Name: Tenneco, Inc
    • Min Year Covered: 2001
    • Most Popular Make / Model: Nissan Pathfinder
    • Most Popular Year: 2001
    • Muffler Body Height: 5.0
    • Muffler Body Length: 12.0
    • Muffler Body Material: Steel
    • Muffler Body Width: 5.0
    • Muffler Color / Finish: Aluminized
    • Muffler Inlet: Centered
    • Muffler Inlet Connection Type: 2-Bolt Welded Flange
    • Muffler Inlet Count: 1
    • Muffler Inlet Diameter (in): 2.0
    • Muffler Inlet Diameter Designation: Outside Diameter
    • Muffler Outlet: Centered
    • Muffler Outlet Connection Type: Pipe Connection
    • Muffler Outlet Count: 1
    • Muffler Outlet Diameter (in): 2.25
    • Muffler Outlet Diameter Designation: Outside Diameter
    • Muffler Overall Length: 49.5
    • Muffler Reversible: No
    • Muffler Shape: Round
    • Outlet 1 Outside Diameter: 2.250
    • Outlet Configuration: Center
    • Overall Length: 49.500
    • Product Grade: Economy
    • Reversible: No
    • Shape: Round
    • Supplier Company Name: Tenneco, Inc
    • Total Part VIO: 158500
    • Universal Or Specific Fit: Specific
    • UPC: 086387189620
    • Part Description: Soundfx Rear Aluminized Steel Round Direct Fit Exhaust Muffler
    More Info
    $51.99