I've always liked the looks of the GT350/GT500 Rear spoiler with gurney flap, and have been considering swapping it out with the stock performance pack spoiler. My question is whether it would actually provide some beneficial downforce on the track or if it would upset the aero balance without any additional front or underbody aero additions that the GT350/500 and Mach 1's have. I have considered adding the additional lower front spoiler that used to come on the PP2 cars, as I prefer a mostly stock look to my cars, but was worried about smashing it on curbs and speedbumps all the time since my car will be slightly lowered. I have also looked in to the the GT500/Mach 1 rear valance kit that adds some rear underbody aero as well.
Link to the spoiler in question
![spoiler.jpg spoiler.jpg](https://trackmustangsonline.com/data/attachments/96/96815-4b70733a517f7edf71e92b6db4eacd13.jpg)
Link to the spoiler in question
![spoiler.jpg spoiler.jpg](https://trackmustangsonline.com/data/attachments/96/96815-4b70733a517f7edf71e92b6db4eacd13.jpg)