12640 Round Straight-Through Performance Exhaust Muffler
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MAGNAFLOWPART NUMBER: 642-12640

12640 Round Straight-Through Performance Exhaust Muffler

$16200
ShippingShips on 09/08/2026
Lowest PriceLowest Price Guarantee


Center In / Center Out: Round
Straight-Through Performance Muffler
  • 2.5 in. Center/Center
  • 6x27x6 in. Body
  • Stainless Steel

    The MagnaFlow 6in. Round Straight-Through Performance Exhaust Muffler 12640 brings our world-famous exhaust sound and dyno-proven performance to your ride in a weight-optimized 6x6x27in. package with a premium satin finish. The straight-through free-flowing design of this round-bodied muffler's reversible, universal 2.5/2.5in. diameter inlet/outlet layout enables versatile installation options to match the spacing requirements of your vehicle. Due to the cutting and welding involved, professional installation is highly recommended. Internally, 12640 utilizes a perforated stainless steel core wrapped in stainless steel mesh and acoustic fiber fill to achieve a powerful, resonant tone. This muffler is made of durable, corrosion resistant stainless steel and produced using cutting-edge CNC precision robotic manufacturing techniques, all backed b y MagnaFlow's limited lifetime construction warranty.

    Magnaflow 12640 Round Straight-Through Performance Exhaust Muffler Features:

    • Delivers a Smooth, Deep Tone
    • Mufflers are Bi-Directional
    • 100% Stainless Steel
  • Magnaflow Performance Satin Stainless Mufflers are the perfect choice if you are looking for performance, quality and sound. Magnaflow uses a straight through perforated core for low back pressure that improves the horsepower output of your engine. By using 16-gauge stainless steel for the body, end caps, and core you get long life for your money. By densely packing in the stainless steel mesh and high density high temperature resistant acoustical suppression material you get that signature Magnaflow rumble that is built to last.

    Show MoreFeatures:
    • 16-Gauge All Stainless Steel Design
    • Fully Welded Lap Joints
    • One Piece High Flow Core
    • Stainless Mesh
    • Densely Packed Acoustical Material

    Part TypeMuffler
    Product LineMagnaflow Satin Stainless Steel Mufflers
    BrandMAGNAFLOW
    Package Height8.0
    Package Width8.0
    Package Length37.0
    Weight14.75 PG
    Part CategoryPerformance Parts
    Outlet QuantityOne
    Inlet LocationCenter
    Inlet PositionFront
    Inlet TypeSingle Center Inlet
    Inlet Size (In.)2.5
    Outlet StyleStandard, without tip
    Muffler FinishNatural
    Body Length27 in (685.8 mm)
    Muffler Count1
    Inlet Diameter2.5 in (63.5 mm)
    Inlet QuantityOne
    Muffler MaterialStainless steel
    Outlet Size2.5 in (63.5 mm)
    PositionN/A
    Inlet Connection TypePipe Connection
    Outlet Diameter2.5 in (63.5 mm)
    QuantitySold individually
    Overall Length33 in (838.2 mm)
    Material409 Stainless Steel
    Case Length27 in (685.8 mm)
    Internal ConstructionPerforated stainless tube with packing
    Case ShapeRound
    Body Width6 in (152.4 mm)
    Muffler ConfigurationCenter/Center
    Outlet LocationCenter
    Body Height6 in (152.4 mm)
    Outlet TypeSingle Center Outlet
    Case Outside Diameter6 in (152.4 mm)
    Part FitmentUniversal
    Outlet PositionRear
    Vendor Part Number12640
    Package Qty1
    Package TypeEA
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    Some parts are not legal for use in California or other states with similar laws / regulations
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