Cat-Back Exhaust

Milltek Non-Resonated Cat-Back Exhaust | Ford Mustang S550 2.3L - Cerakote Black Tips

Brand: Milltek

Part #: SSXFD177

$2,724.22+2724 pts

In Stock

SKU: MK-SSXFD177

Ships direct from the warehouse Guaranteed fitment 30-day returns

Description

Milltek's Non-Resonated Cat-Back for the Ford Mustang 2.3 EcoBoost (S550, 2015 to 2018) is a 2.76-inch (70mm) T304L stainless steel system with a quad-tip outlet that gives the EcoBoost four its most aggressive Milltek voice, at direct OEM fitment. It is built for S550 EcoBoost owners who want maximum volume and presence, and bolts to the factory hangers with no cutting or welding. What is the non-resonated cat-back for the EcoBoost Mustang? It is a full cat-back in hand-finished T304L stainless, mandrel-bent in 2.76-inch (70mm) pipe. Non-resonated means it omits the centre resonator, so it is the louder, more aggressive option in the range, with a quad-tip rear layout that gives the EcoBoost a wider-mouthed look and sound. Who is it for? It suits the 2.3 EcoBoost S550 owner who wants the boldest tone Milltek offers for the car. If you cover long motorway miles and want to avoid cruise drone, the resonated version is the calmer choice. What does it include and what are the specs? The system ships as a complete non-resonated cat-back with a quad-tip outlet, Cerakote Black tips, OEM-compatible hangers and the fixings for a bolt-on fit. MaterialT304Lstainless, hand-finished Pipe diameter2.76" (70mm), mandrel-bent ConfigurationNon-resonated cat-back, quad-tip outlet TipsCerakote Black FitmentFord Mustang 2.3 EcoBoost (S550 Fastback), 2015 to 2018 InstallDirect OEM fitment, no cutting or welding What are the limitations, and who is it NOT for? Non-resonated means louder, and it can drone at a steady cruise; choose the resonated version if that matters to you. This is a cat-back, so it does not change the catalytic converter or downpipe, and on a cat-back alone expect a tone upgrade rather than a headline power figure. Every system is built in hand-finished T304L stainless. (Source: Milltek Sport, About Us.) Last updated: 2026-07-01. Designed in Tennessee and manufactured in the UK with 40+ years of performance exhaust heritage. Tested on the Tail of the Dragon.