heyy im planning on throwing on sum 20" on my 04 coupe.
should i be ok with my stock brakes or should i invest and buy new brakes?

 

Why 20"s? Other than aesthetics, you lose everywhere else. Weight, cost and handling. Honestly, I wish I had my 18"s back. I'd stick with 19"s unless you're getting a great deal on 20"s and you won't have to change your brakes yet. Remember, your brakes are only as good as your tires and if you get 20"s a great performance tire is pretty pricey. Just my opinion.

 

ditto!!

 

you'll be fine. I use to think my brembos were big now they look so tiny behind my 20"s but other than that they work fine.
I did hold on to my 18"s for track days and things of that nature.

 

It depends on your driving style, for street driving the OEM's are fine, especially if you switch the brakes lines and fluid.