Thermal R&D
2014-2019 Ford Fiesta ST - Catback Exhaust
2014-2019 Ford Fiesta ST - Catback Exhaust
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Constructed from mandrel-bent T304 stainless steel throughout, this system delivers the corrosion resistance and structural integrity that budget systems built from 409 stainless or aluminized steel simply can't match over time. Mandrel bending keeps tube diameter consistent through every curve — no pinched sections, no turbulence, no flow restrictions. Out back, dual polished 2.5" angle-cut tips are sized and positioned to fit cleanly within the OEM rear valance without modification — a fitment detail that competitors have publicly struggled to get right on this platform.
The system mounts directly to the OEM catalytic converter and uses factory hanger locations for a clean, direct bolt-on installation. No cutting, no welding, no fabrication. Just a straightforward upgrade that transforms the way the Fiesta ST sounds and breathes.
- Fits 2014–2019 Ford Fiesta ST (1.6L EcoBoost)
- Full 3" mandrel-bent T304 stainless steel catback system
- True Helmholtz Technology — straight-through mid-pipe resonator + rear resonator for engineered drone elimination
- Largest diameter catback available for the Fiesta ST platform
- Dual polished 2.5" angle-cut tips — designed to fit OEM rear valance
- Mounts directly to OEM catalytic converter
- Direct bolt-on using factory hanger locations
- No cutting or welding required
- Mill finish tubing and resonator / polished muffler and tips
- Limited Lifetime Manufacturer's Warranty
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