Cat Back Exhaust for Ford Mustang (2015-2020) 5.0L
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Direct-Fit Mandrel-Bent Cat-Back Exhaust for 2015-2020 Ford Mustang
What it Does: The Cat-Back Exhaust replaces the restrictive factory center resonator and chambered mufflers on the 2015-2020 Mustang to reduce backpressure, accelerate exhaust gas evacuation, and optimize volumetric efficiency.
The Stock Ford Mustang Exhaust Flow Restriction
Factory exhaust assemblies on the S550 platform utilize heavily baffled suitcase resonators and chambered mufflers tuned strictly to damp acoustics rather than support thermodynamic efficiency. These restrictive OEM components create disruptive turbulence and excessive backpressure for the high-revving Coyote 5.0L V8, dampening exhaust scavenging and retaining radiant heat under the chassis. Furthermore, standard factory crimp bends narrow internal cross-sectional area, impeding peak-RPM flow dynamics.
The Engineering Solution
This direct-fit cat-back exhaust system replaces factory restrictions with continuous-radius, mandrel-bent aluminized steel piping engineered to preserve laminar flow and uniform diameter through every bend. Paired with straight-through or optimized-core mufflers, the system drastically cuts parasitic pumping losses, allowing the Coyote engine to breathe freely without inducing cabin drone. Constructed with pre-welded heavy-duty hangers engineered for direct engagement with OE rubber isolators, the kit includes corrosion-resistant polished stainless steel tips for long-term thermal and aesthetic stability. Designed around factory junction locations, it secures using direct-fit flanges and included clamps without requiring body modification or welding.
Technical Specifications
| Fitment | 2015-2020 Ford Mustang |
|---|---|
| Engine / Chassis | 5.0L Coyote V8 / S550 |
| Stock Output | 435-460 hp / 400-420 lb-ft |
| Replaces OEM Part # | SPT-CAT1274 |
Compatibility
- 2015-2020 Ford Mustang GT (5.0L V8)
- 2015-2020 Ford Mustang GT Premium (5.0L V8)
- 2019-2020 Ford Mustang Bullitt (5.0L V8)
Frequently Asked Questions
Does this fit the S550 Mustang?
Yes, this is a direct fit for the 2015-2020 Ford Mustang equipped with the Coyote 5.0L engine.
Will this cat-back exhaust system trigger a Check Engine Light (CEL)?
No, this assembly installs completely downstream of factory catalytic converters and oxygen sensors, maintaining intact OBD-II emissions readiness.
The Ford Mustang V8 Acoustic Caliber
Engineered specifically for the firing order and scavenging characteristics of the modern quad-cam V8, this exhaust eliminates factory resonance bottlenecks to deliver clean acoustic feedback and unrestrained top-end power.
Fitment
Fitment
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Warranty
Warranty
All products are backed by our Limited Lifetime Warranty. We stand by our quality. [See terms]

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$174.95