will they fit our cars or do they need spacers. what about the 7 series car.

bolt pattern wise, yes, but may require a little material to be removed in the lug holes. back spacing wise, what are they?

if they fit why do i have to grind them. i have no clue what the b.s. is its in mm i know that much

thier bolt pattern is 120 mm

ours is 4 3/4 or 120.7 mm

thats not much, some people say they need a little removed, some dont, i dont have an experience with them, im just telling what i know

http://www.rsracing.com/tech-wheel.html <good stuff

I would only do it if you are positive you have the wheel centered. Sure they may bolt up, but they may also be that small fraction off front center. At 7mph that will cause a bad vibration and can become dangerous.

so do you guys think i should do it or no

I would read up on it more and see what guys have done to make wheels like this fit. I know there are a few good threads out there that outline what you need to do. I would not just bolt and go.