I'd like to see more seat color options. I'd like to see
RED I'd also like to see alcantera seat inserts (or something similar) and I'd really like to see that extra stiching on the seats like in the SEMA cars. Also like stated above RECAROS would be awesome. They could just lift the ones from the CTS-V...... I LOVE

those seats.
As for the outside of the car, more wheel options. I'd like to see painted stripes but I'm doubtful in that cause of the extra cost to paint them.