Not Ranked
I do not own a Roush but I have seen 6-8 installed in Cobras.
In my opinion Roush does NOT make a good hamburger when you do compare with some other manufacturers . Stand alone they are real nice. But there are definitely less expensive options with minimal to no consequence.
I would follow the advice mentioned by others in this thread and research Ford Racing with the new warranties and CHP whose 427W DOES make the power they advertise. + 2yr warranty.
If you consider those options you may very well find you have money left over to eat at McDonald's many times over.
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