stags

I currently drive a stock 2009 v6 pony package. And I also live in Boulder, so Im a mile high and right in the foothills of the rocky mountains, so I spend alot of time zipping around windy mountain roads with steep grades. I would really love to upgrade the suspension on my v6, and I was wondering what suspension kits or upgrades you all would recommend, as well as a good brake kit. My dad has a 2008 Saleen 281 SC (Mustangs are a family affair ), is the Saleen suspension kit a worthy replacement?