Originally Posted by suss6052
The primary catalyst is integrated in the Exhaust manifold. Some people (FocusBoy58 comes to mind) have changed the exhaust manifold with one of the catless aftermarket pre 2011 2.0 L duratec headers, but if you were concerned about emissions and or vehicular inspections its best to leave the main cat alone, although PZEV vehicles have a secondary catalyst behind the first one and ahead of the resonator and mufflers.
Back to this for a second. From what I hear, the cat is the most restrictive part of the exhaust system. When you say its integrated into the exhaust manifold, are you saying you can't physically replace it without replacing the manifold? My focus isn't in CA or PZEV so I'm assuming that's my only cat. You'd think you'd get better performance if you swap out that one with a magnaflow one for example, right?
2012 Ford Focus SE Sedan, Red Candy Metallic Tinted CC, 5 Speed Manual
SE Sport and Winter Packages, 203A Equipment Group, 17" M&P Wheels
K&N 69-3517TS Intake, Magnaflow 15138 Catback Exhaust, WeatherTech 82573 Window Visors, 5% ON-35 Madico Tint