Quick view Cobb | sku: 5M2150 Cobb V2 Cat-Back Exhaust For 15-20 Ford Mustang Ecoboost The COBB Cat-Back Exhaust System for the EcoBoost Mustang is a direct replacement for the factory exhaust. It comes with a 2.5" adapter that tapers down to be used with the factory downpipe or can be used without the adapter and bolted directly to the... $1,195.00 Add to Cart Compare