Winter Upgrades (Feedback wanted)

My car run's 10'son street tires. pump gas an through the muffler's. It will idle and drive around town all day without issue as well.

Can I run it to it's full potential around town power wise, not really, but there is no sacrifice in my case.

What car can you run to it's full power potential around town or on roads? None, at least not legally.
I do. And it's a blast.