2 common mods available on the market that make a noticeable difference on the car's handling are fender braces and a rear diffuser, yet there aren't any available for the 370 yet after 4 years. Whats going on?
For those who don't know what they look like, here's some examples on the 350:
As for the "rear diffusers" that available for the 370 right now, those are just pretty cosmetic pieces that don't do jack sh1t.