So, Here are their cars, Again, My apologies for the Bad digital art, I'm still learning.

Rapp's Alfa Romeo Brera
Boost:
- Single Turbo
- Nitrous
Spec:
Interiors are Stock, Bodykits are stock, Seats are stage 2 seats, and it uses a Wing spoiler

Connor's Celica
Boost:
- Twin Turbos
- Nitrous
Spec:
Interior:
- Sparco Steering wheel.
- Bride Seats.
- Roll cage
Bodykits:
None, Except for the Bumper and Spoiler.