Transmission shield or tunnel cover
i would spend the extra 100 bucks and get the CSR (twrcp shield 155.00 and flex plate- you need both- 65.00) . The tunnel in that car is tight and the CSR fits well.
Safety in parts no mater what the cost should be the most important thing. Racing is not a cheap hobby. Plus your car can hurt you and others. Take it slow... write single on you windshield untill you get use to the car. Better for you and everyone.