I recently spent a day out at GTR High Performance (www.gtrhipo.com), where we did some bolt-on performance tests with a stock '06 Mustang GT.
While today's blog includes photos of the parts we installed and dyno tested, you won't get any results on how the upgrades performed until you read about them in our May '09 issue. For all the stock S197 owners who are reading this, I think you'll be making upgrades after you read the story.
Head across the jump for photos, and a link to a video short of our "total package" dyno run!