DEI 2.5in SS Resonated Cat Back Exhaust Ford Fiesta ST

Provide a refined exhaust flow and audible response with the DEI 2.5in SS Resonated Cat Back Exhaust Ford Fiesta ST, delivering a more pronounced exhaust tone while maintaining a controlled character that lets the 1.6L EcoBoost be heard without excessive drone.

Designed in collaboration with Mishimoto, this cat-back exhaust uses a 2.5" overall diameter to produce a subdued yet aggressive exhaust tone tailored for the Fiesta ST. The system is offered with an optional resonated mid-pipe to fine-tune sound and minimize unwanted resonance at cruising speeds.

This description focuses on functionality, durability, and acoustic performance: the system manages exhaust flow and tone for the 1.6L EcoBoost engine while fitting the factory routing and mounting strategy typical of a performance exhaust replacement.

Key technical features and why they matter

• 2.5" overall diameter — Provides a balance between exhaust flow and backpressure control, enabling the intended audible response without compromising daily drivability.
• Resonated mid-pipe (optional) — Allows tuning of the exhaust tone and reduction of in-cabin drone at steady throttle, useful for drivers who want a spirited sound profile with vehicle-friendly refinement.
• Cat-back configuration — Replaces the exhaust from the catalytic converter back, simplifying installation while retaining factory upstream emissions hardware and fitment strategy.
• Mishimoto-backed design — Leverages Mishimoto's reputation for motorsports-grade fit and finish to ensure consistent assembly, fitment, and repeatable acoustic behavior.

Keywords associated with the product include performance exhaust, high-flow, and turbo upgrade—terms that describe the system’s orientation toward enhanced exhaust sound and flow for turbocharged applications like the Fiesta ST's 1.6L EcoBoost.

This product description is limited to verified characteristics: 2.5" diameter, resonated mid-pipe option, cat-back layout, compatibility with the Fiesta ST 1.6L EcoBoost application, and Mishimoto branding.