These wheels look really great.

BUT, what would be the performance hit/impact on going from the lighter and narrower stock wheels:

Front:
Size: 18x8.0
Weight: 24.4

Rear:
Size: 18x8.5
Weight: 25.8

To the heavier and wider 5zigen 520's:

Front:
Size: 19x9.0
Weight: 29


Rear:
Size: 19x10.0
Weight: 30

100.4 lbs vs 118 lbs.

Is it worth it for the looks?

 

^of course, unless your building a race car, put an aftermarket exhaust on it and you will lose those 18 lbs