General

Engine

Suspension

Interior

Exterior

Competition

If you can, select the coupe as it is 30 lbs lighter than the 4-door and possibly a stronger bodyshell. On the other hand, I don't think that 30 lbs will make or break the success of this car unless you are the best driver.

Street Prepared requires you to keep the bumpers. It's a shame, since you could save 40 lbs by removing them, but at least all your competitors are in the same boat!

Don't try fitting rims wider than 6" unless you flare the rear fenders. Street Prepared doesn't let you replace the fenders with the cool Abarth-style panels, but you can cut/pound/reweld the rear fenders and add extensions to the front fenders.