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So I installed stainless works headers on my 2019 Mustang yesterday, turned it on and my factory active exhaust said it lost its function. Does anybody know why this is? Is this normal? I searched the forum and did not find an answer.

has anyone cut the valve off the OEM active exhaust and used a different muffler or tip combo with it? like taking a non-active aftermarket muffler and placing the OEM valve on it. just wondering because I want to do this but, not sure how the back-pressure might affect the engine if placed...

my car is a s550 gt I have a chance to get a p1sc1 but its for a 4.6 mustang for dirt cheap. I know that the plumbing is different but is the supercharger the same right? 2nd question: do they make kits with just the plumbing?

So I go this error code u0415 and I was able to clear it (per my tuner but the car still isn't fixed. It just happened out of no where I haven't hooked my tuner up in months so that can't be the cause. Any ideas before I reach out to the dealership.