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Yes, 10 speed and 93. I had put Performance Pack II on my 2015 GT and the difference surprised me (knowing now, it pretty much brought the engine up to M1 performance), so I wasn't expecting a big change for the M1. The improvement with the Steeda tune was pleasantly surprising! Punch it just a...

I did the Steeda M1 tune with the X4 tuner and the difference was noticeable immediately. I love it. No issue with passing my Massachusetts inspection. And as ChitownStang mentions, I can put it back to stock any time I want or need to.

With the tune, it'll chirp the tires even with the traction control on when I'm more assertive (not aggressive!) with the throttle.

I am delighted with the improvement on my stock '21 non-hp Mach 1. The throttle response is quicker and there is definitely more torque in the lower RPM range that gets the car moving quicker than before the tune.

I have the X4/Steeda tune on my no mods M1 and have the same positive experience. The difference was immediately noticeable and even assertive (more than the M1 already is) for spirited driving.

The optional wheels, or something close, look great and are easy to clean, especially if you ceramic coat them while they're new.

Don't be afraid, but be aware. It doesn't bite, but it might not hold if you're at the edge of grip! I put one of their cars into the wall in our last track session on the second day when I was just slightly on the throttle going across the painted lines and the Cup 2s didn't give any warning...

Awesome experience! I went in 2021 right after getting my car. Had a blast with the two-day. Get the insurance and keep neutral throttle going over the painted stripes when you get to the oval / infield transition.

Hmmm, every now and then my 2021 Mach 1 A10 hangs up in a gear when I'm not driving in a way that would encourage sport behavior, or delays going into reverse. If I see it much more, I'll raise it with my dealer. Thanks for posting.

No issues with my 2021 M1. My 2011 SHO auto high-beam is slower to react to oncoming lights than the M1, so to me it is unlikely its your lights unless they aren't aimed right. In case it didn't come up to you already, are you sure the shipping blocks are out of the front springs?

Left it as it didn't interfere with installation.

It's a Euro look, for those who like the Lambo look. I'm not a fan, but respect that they're doing their Mustang their way.

That's not an issue. It's easy to fit a hand with a microfiber towel between the louvers to dry when needed. On a day to day basis, the rear window doesn't get much water in the rain. Most wet is when I wash it and spray water up through the louvers.

Agreed. That's why I went with the metal ones instead of plastic. Yes, the coating will get chipped (the probably can be PPF'd but I didn't do that), but they're solid, stay on even at speed (I kept them on the 2015 when I tracked it), are easy to remove by one person when needed), and haven't...

Just to share, here's a pic of the 2015 and 2021 with louvers (before I sold the 2015).

Yes, Speedform aluminum. CJ Pony parts had the best price at the time (2021). Exactly the same as I had on my 2015 GT. Easy installation. I ceramic coated this set using ArmorShield IX -- so much easier to clean!

Highly recommended IMHO. Had them on my 2015 and love them even more on my '21 Mach 1.

Concur. I'm in southern New England and go to my square set of A/S3s once the temps start staying below 50 consistently.

Just hit 25k miles on M1869 on a leaf-peeping trip thru central Massachusetts. Miles per gallon were good today and smiles per mile remain off the charts!

I'm happy to confirm my Armor Shield I ceramic made no visible difference on the matte stripe or plastic trim. I coated mine right after delivery in March 2021 and just passed 24K miles on it. Water still beads like it was freshly coated. Yes, I use the Armor Shield maintenance products and have...