18129 Round Glasspack Performance Exhaust Muffler
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MAGNAFLOWPART NUMBER: 642-18129

18129 Round Glasspack Performance Exhaust Muffler

$6750
ShippingShips on 09/08/2026
Lowest PriceLowest Price Guarantee

4" Round
Glasspack Performance Muffler
  • 3 in. Center/Center
  • 4x18x4 in. Body
  • Stainless Steel

    The MagnaFlow 4in. Round Glasspack Performance Exhaust Muffler 18129 enhances your ride with the deep, classic sound that glasspack mufflers are known for. The round muffler body features a free-flowing reversible straight-through 3/3in. diameter configuration and single stage packing with a satin finish. This weight-optimized glasspack muffler is engineered to bring out the inner hot rod in your ride with plenty of volume and dyno-proven performance, so please check to ensure compliance with local noise regulations. 18129 offers flexibility when it comes to installation thanks to its universal design, however, professional installation is recommended. Muffler 18129 is made of corrosion resistant aluminized steel and produced using CNC precision robotic manufacturing techniques, all backed by MagnaFlow's 90-day limited construction warranty.

    Magnaflow 18129 Round Glasspack Performance Exhaust Muffler Features:

    • Straight-through performance design
    • Anti-corrosive aluminized body
    • Dyno Proven
  • Magnaflow Glasspack Mufflers have a free-flowing aluminized body, straight-through perforated core, and acoustical material to deliver a smooth, deep tone and ensure long life without sound degradation.

    Features

    • Dyno-Proven
    • Center Inlet, Center Outlet
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    • Anti-corrosive aluminized body
    • Straight-through performance design
    • Deep exhaust note that demands attention
    • Sound of horsepower from idle to full throttle
    Part TypeMuffler
    Product LineMagnaflow Glasspack Mufflers
    BrandMAGNAFLOW
    Package Height4.4
    Package Width4.7
    Package Length23.9
    Weight7.1 PG
    Part CategoryPerformance Parts
    Outlet QuantityOne
    Inlet LocationCenter
    Inlet PositionCenter
    Inlet TypeSingle Center Inlet
    Inlet Size (In.)3
    Outlet StyleStandard, without tip
    Muffler FinishAluminized
    Body Length18 in (457.2 mm)
    Muffler Count1
    Inlet Diameter3 in (76.2 mm)
    Inlet QuantityOne
    Muffler MaterialSteel
    Outlet Size3 in (76.2 mm)
    PositionN/A
    Inlet Connection TypePipe Connection
    Outlet Diameter3 in (76.2 mm)
    QuantitySold individually
    Overall Length22 in (558.8 mm)
    MaterialAluminized Steel
    Case Length18 in (457.2 mm)
    Internal ConstructionGlasspack
    Case ShapeRound
    Body Width4 in (101.6 mm)
    Muffler ConfigurationCenter/Center
    Outlet LocationCenter
    Body Height4 in (101.6 mm)
    Outlet TypeSingle Center Outlet
    Case Outside Diameter4 in (101.6 mm)
    Part FitmentUniversal
    Outlet PositionCenter
    Vendor Part Number18129
    Package Qty1
    Package TypeEA
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