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I literally just bought a brand new M550i today and i am all over the place with what i want to do to it. I feel like i would really want to do the dinar s1 tune and watched so many videos on it on youtube. I paid and extra $8,000 for a 100k mile warranty. I see so many people say that dinar does not jepardize the warranty but my dealership said it 100% will completely void my warranty. What is the truth with this?
Also how much faster does it really make the car, Very noticeable difference?
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