They (or other suppliers like MM) may supply non-genuine Mach 1 upgrades potentially. For example, the Shelby GT350 lip extension may fit the new Mach 1 splitter. Then there is the GT 350 rear spoiler.
For me, it's only really the wheels but I will reserve my judgment until I see them in the flesh. The new 19" are wider than the GT wheels so may fill the guards better.
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