Stickers are illigal in MA.

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Im not 100% sure but I belive you can have anything in the back window as far as sitckers tint etc goo… and IIRC you can pretty much spray paint it black and be okay…

I had a cop try and write me a ticket for the streetglow banner on my POS grand prix… i told him I know its legal and he stfu but still I was like wow really