Runs on Unapproved Modifications – Funny Mechanic & Tuner Design Crewneck Sweatshirt

Some builds follow regulations. Others follow inspiration, improvisation, and a box of parts that definitely weren’t in the original plan. “Runs on Unapproved Modifications” is a bold, tongue‑in‑cheek nod to every gearhead who’s swapped, hacked, tuned, or zip‑tied their way to greatness. Perfect for project cars, track toys, off‑road rigs, and anyone who proudly operates outside the rulebook. Put it on your bumper, toolbox, laptop, or garage fridge and let the world know your ride is held together by creativity and questionable decisions.

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