Coming in hot on the turns I feel the back slipping a little. Though I can catch it, I think having some downforce in the rear can help. Any suggestions on a Spoiler to get?

Thanks in advance,

 

There is a guy on east coast of Florida that makes a nice looking prepainted bolt on wing. Been thinking about that one. Question is, what effect if any would it have. I believe a GT4 type big wing up in clean air might work best. However once the speed is below 50 to 70, doubt there is much downforce effect. In other words, you are probably still braking in a straight line.