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Vehicle Info NeededFLOWMASTERPART NUMBER: 389-717877
FlowFX Axle-Back Exhaust System 2011-2014 Ford Mustang 3.7L V6
$64995
Ships on Sep 04, 2026
Lowest Price GuaranteeFord
FlowFX Axle-Back Exhaust System2011-2014 Ford Mustang 3.7L V6 2.500 in. Tubing 4 in. Black Ceramic-Coated Tips Dual Rear Exit 409 Stainless Steel
Flowmaster 717877 FlowFX Axle-Back Exhaust System Features:
- Mild sound and performance
- Mandrel-bent 16-gauge stainless steel tubing
- Gains 7 HP and 6 ft.-lbs torque at the rear wheels
- Attaches with included hardware to factory hangar locations for easy installation
Aggressive Exhaust Tone
Bright 409 stainless steel Flowmaster FlowFX Exhaust Systems have straight-through FlowFX mufflers with a large core for a deep, moderate-to-aggressive exterior and interior sound. Each kit is designed and dyno-tuned for maximum performance, so you know you are getting the most out of your exhaust system.
Part TypeExhaust System
Product LineFlowmaster FlowFX Exhaust Systems
BrandFLOWMASTER
Package Height14.5
Package Width14.5
Package Length35.0
Weight26.25 PG
Muffler Body Diameter4 in.
Tip Diameter4 in (101.6 mm)
Muffler Inlet Inside Diameter2.50 in.
Hangers IncludedYes
Main Piping Diameter2.50 in.
Tail Pipe QuantityDual
Inlet TypeClamp-On
Exhaust Tip Material304 Stainless Steel
Oxygen Sensor PortNo
Catalytic Converter Quantity0
Exit LocationDual Rear
Inlet Quantity2
Tip FinishBlack Ceramic
Muffler Body Length14 in.
Sound LevelModerate/Mild
Muffler Body Material409 Stainless Steel
UniversalNo
Hanger IncludedYes
Exhaust Tip CutAngled
Gasket Or Seal IncludedNo
Exhaust Tip IntercooledNo
Pipe ColorSilver
Muffler Quantity2
Muffler Inlet Outside Diameter2.63 in.
Exit QuantityDual
Tip Material409 Stainless Steel
Muffler Flanged OutletNo
Tip Quantity2
Exhaust Tip ResonatedNo
Muffler Outlet LocationCenter
Catalytic Converter IncludedNo
Part CategoryPerformance Parts
Hardware IncludedYes
Exhaust Tip WallSingle Wall
Exhaust Tip Quantity2
Muffler Inlet LocationCenter
Exhaust Tip FinishBlack Ceramic Coating
Exhaust Tip EdgeRolled Edge
Valve IncludedNo
Muffler TypeAbsorption
Pipe Material409 Stainless Steel
Tail Pipe Tapered OutletNo
Gauge16
Muffler Body ShapeRound
Mounting Bracket IncludedNo
Muffler Outlet Quantity1
Muffler FinishNatural
Mount TypeUses Factory Hangers
Inlet Diameter2.5 in (63.5 mm)
Clamps IncludedYes
FinishNatural
Exit StyleDual Out Rear
Tip IncludedYes
Clamping TypeFlat Band
Muffler Flanged InletNo
Mandrel-BentYes
Spring Bolt Kit IncludedNo
Muffler SeriesFlow FX
QuantitySold as a kit
Muffler IncludedYes
Exhaust Tip ConnectionClamp-On
System StyleAxle-back
Tail Pipe Outlet Outside Diameter2.50 in.
Muffler ConfigurationCenter/Center
System Material409 Stainless Steel
Valve TypeNot Applicable
Exhaust Tip Diameter4 in.
Part FitmentDirect Fit
Vendor Part Number717877
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
