Steeda CAI + O.E.M. ST cat back exhaust on my 2.0 L GDI Ti-VCT engine in the 2012 Ford Focus SEL. Its very quiet when cruising, but if you step on it to accelerate you'll definitely feel it.
Afaik the stock ST exhaust is 2.5" vs the 2.25 of the magnaflow.
Moderator for: DURATEC Ti-VCT Performance, ST Performance, MK3 Focus, Great Lakes Fanatics