Didnt realize I would really like all the body kits. But I got a 911 GT2 RS, plopped on the body kit and could not be happier with how snazzy it looks. Was wondering if anybody has seen or created a list of all the cars in game that have body kits available
Edit: it looks like if you go into your “my cars” section you can filter by “upgrade presets available” and I believe that would be body kits, but also it may have engine and suspension modifications.
Go to the autoshow go to the filter and there is an option to select cars with presets.
Most of these cars have wide body kits.
EDIT: Just seen the edit 
A simplified list.
*1: This list is based on my memory. Therefore, there may be omissions.
*2: All models with unique visual parts other than Forza race bumpers and Forza race wings are counted. This is not a list of only cars with wide body kits.
*3: I also count cars that only have Forza bumpers and Forza wings, as long as their design is unique and different from the generic ones.
*4: “Bumper removal”, which is common in classic cars, is included in the count.
*5: In the case of cars that are not available at this time, such as Zerouno, the list is based on data from previous titles.
Acura