Made in USA
ProXS Muffler
InfoVehicle Info Needed
BORLAPART NUMBER: 157-40358

ProXS Muffler

$12999
ShippingShips on Oct 13, 2026
Lowest PriceLowest Price Guarantee

Center In / Offset Out
ProXS Muffler
  • 2.5 in. Offset Inlet/2.5 in. Center Outlet
  • 4 in. x 9.5 in. Oval
  • 14 in. Long Body
  • T-304 Stainless Steel
  • Sold Individually

    The ProXS Muffler delivers a durable, performance-tuned exhaust solution built to last.

    Borla 40358 Features:

    • Universal muffler. Reversible design.
    • 2.5 in. Offset Inlet/2.5 in. Center Outlet, 4 in. x 9.5 in. Oval, 14 in. Long Body, 19 in. Overall Length.
    • Un-Notched necks are designed for weld in installation. If clamping, use 3 in. wide band clamps 18004.
    • Alternate muffler with Notched necks is 400480. Use 1 in. wide band clamps 18325.
  • Precision manufactured by the pioneer in exhaust performance, BORLA Pro XS mufflers feature proven high-powered technology that is surprisingly affordable. Made of rust-free high quality, austenitic stainless steel, Borla Pro XS mufflers deliver more power, improved fuel economy, prolonged engine life, and a street-commanding growl that screams performance.

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    Features:

    • Straight Through Exhaust Flow
    • Rust Free High Quality Stainless Steel
    • Will Not Heat Harden Like Other Systems
    • Mufflers Are Reversible
    Part TypeMuffler
    Product LineBorla Pro XS Mufflers
    BrandBORLA
    Package Height4.8
    Package Width10.2
    Package Length20.8
    Weight9.25 PG
    Part CategoryPerformance Parts
    Outlet QuantityOne
    Inlet LocationCenter
    Inlet PositionCenter
    Main Piping Diameter2.500 in.
    Inlet TypeSingle Center Inlet
    Inlet Size (In.)2.5
    Outlet StyleStandard, without tip
    Muffler FinishNatural
    Body Length14.000 in.
    Muffler Count1
    Inlet Outside Diameter2.500 in.
    Inlet Diameter2.5 in (63.5 mm)
    Inlet QuantityOne
    Outlet Outside Diameter2.500 in.
    Muffler MaterialStainless steel
    Outlet Size2.5 in (63.5 mm)
    ConstructionAll Welded
    Inlet Connection TypePipe
    Outlet Diameter2.5 in (63.5 mm)
    QuantitySold individually
    Overall Length19.000 in.
    MaterialT-304 Stainless Steel
    Case Length14 in (355.6 mm)
    Internal ConstructionStraight-through core
    Case ShapeOval
    Body Width9.500 in.
    Off Road Use OnlyNo
    Outlet LocationOffset
    Body Height4.000 in.
    Outlet TypeSingle Offset Outlet
    Part FitmentUniversal
    Outlet PositionOffset
    Grade TypePerformance
    Vendor Part Number40358
    Package Qty1
    Package TypeEA
    No Questions
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