Stock exhausts on the Fiesta ST leave power and character on the table, choking the 1.6L EcoBoost with restrictive bends and mufflers tuned for quiet rather than performance. Thermal R&D's 3-inch catback replaces that compromised plumbing with mandrel-bent T304 stainless steel and polished tips, freeing the turbo to breathe and giving the ST a sound that matches its personality.
True Helmholtz Technology keeps drone out of the cabin. Low-frequency resonance is the enemy of any performance exhaust on a daily driver. Thermal's True Helmholtz Technology targets and cancels those specific tones before they reach the cabin, so the exhaust stays aggressive under throttle and comfortable on the highway, without the fatigue that plagues cheaper systems.
Three-inch mandrel-bent T304 stainless steel construction. Every bend in the system is mandrel-formed to preserve full internal diameter through corners, eliminating the crushed tubing that robs flow in lesser exhausts. T304 stainless steel resists corrosion through seasons of road salt and heat cycling, and the polished tips deliver a clean, finished appearance at the rear bumper.
Bolt-on installation at the factory mounting locations. No cutting, welding, or fabrication required. The system aligns to OEM hangers and mounting points, making this a straightforward weekend install without shop time or custom hardware.
Product Benefits
- Drone-Free Daily Driving: True Helmholtz Technology cancels low-frequency cabin resonance without dulling the exhaust note under load.
- 3-Inch Mandrel-Bent Tubing: Maintains full bore through every bend for unrestricted exhaust flow from the 1.6L EcoBoost.
- T304 Stainless Steel: Corrosion-resistant construction stands up to heat cycling and road salt over years of use.
- Polished Tips: Clean, mirror-finished tips provide a premium look at the rear of the Fiesta ST.
- Bolt-On Fit: Uses factory mounting locations with no modifications required for installation.
- Lifetime Warranty: Backed by Thermal R&D's lifetime warranty for long-term confidence.
- Made in the USA: Manufactured domestically to Thermal R&D's quality standards.
About Thermal R&D: Thermal R&D specializes in performance exhaust systems engineered and manufactured in the United States. The brand focuses on platform-specific fitment, proprietary resonance-control technology, and stainless steel construction that holds up across the full service life of the vehicle.
WARNING: California Residents: Cancer and Reproductive Harm;
www.p65warnings.ca.gov
- Vehicle Trim:
- ST
- Vehicle Fitment:
- 2014, 2015, 2016, 2017, 2018, 2019
