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Not sure, I’ll ask the dealer what happened when I pick up the car.

Good to know I'm not the only one. Still strange that a cat could go bad so quickly though.

I was driving to work on Monday when the CEL came on soon after I exited the highway. Took it to AutoZone to have the codes pulled and it showed P0430 Catalytic Converter efficiency below threshold for bank 2. I initially thought it was a bad O2 sensor and took it into a Ford dealer for further...

From my own observations, the new tune fixes some of the shifting issues on cars equipped with the 10R80 automatic transmission. Power comes on a little better, but again ROUSH didn't officially announce their changelog for each tune revision. In terms of getting notified about tune updates...

Haven't used used them for a Whipple SC install but I've had a good experience with 21st Century Muscle: http://21stcenturymusclecars.com/contact-us.aspx

I have this supercharger on my '18 GT. Just got the latest tune installed today, major improvement compared to the first revision. Haven't had it dyno'd so I can't comment on exact power figures but it definitely pulls hard. Warranty is interesting, it void's the Ford powertrain warranty and you...

Finally got the tune installed and from some initial impressions it’s a big improvement. The 2-1 downshift in Sport/Sport+ is a lot smoother, doesn’t have that sudden jolt like the initial tune. Downshift rev match still isn’t as aggressive as the stock tune but I see a slight improvement over...

Scheduled an appointment with my dealer to get the latest tune installed. Will update this tomorrow.

Let us know how it is I've been waiting for a updated ROUSH tune for a while

Here are two pics from the official press release, one with the base spoiler (silver car) and the other with the CF Track Pack spoiler (blue car).

Went to FI after about 2000 miles, currently at 5200. No problems so far.

Although I haven't used them, 21st Century Muscle seems to be a good one. They are known for their work with Corvettes and Camaros but will do Mustangs as well. http://21stcenturymusclecars.com/contact-us.aspx

Beautiful car! I got my '18 GT from the same dealer.

2018 GT with ROUSH Phase 1 SC

Love it. I have the ROUSH Phase 1 Supercharger and while the ROUSH tune isn't perfect its still fast as hell. The biggest issue is with harsh 2nd to 1st downshifting in Sport/Sport+ mode depending on how you brake but apart from that it's pretty good.

As long as roads are dry, everyday.