Installation Time: Afternoon
July 07, 2013
FRP 2012-2013 Boss 302 Lowering Springs
I had considered the 2012-2013 Boss specific Steeda springs, the Eibach Pro-lines, and the FRP 5300P springs for my 2013 Boss 302. I decided to wait just a little longer to see if Ford Racing would come through with their version of the Boss lowering springs, because 1) I didn't want to risk doing anything to negatively impact the handling of the car, 2) I found it difficult to determine if the non-Boss specific kits would lower the car by the amount advertised 3) I didn't feel that the Steeda springs would lower the car as much as I desired (Only .2" up front and .8" in back)
When FRP finally came out with the Boss springs I cringed a little at the price, but liked what little information was provided in the specs, and decided to pay the extra and give them a try. The install was reasonably straight forward, and it's a good thing, because there were no installation instructions in the box - Just a note directing me to the Ford Racing website for installation instructions. Unfortunately, those didn't appear to exist either. I did however find a youtube video that provided most of the needed install information, and was able to locate the recommended torque specs on another site. All in all, it took 2-3 hours to install both front and rear springs.
Although the specifications imply no other parts are necessary, I would recommend you install an adjustable panhard bar to go along with the springs. You shouldn't have any problem with rubbing if you don't, but the rear-end does shift about 1/2" toward the drivers side of the car.
After a couple of weeks driving familiar routes, my impression is the car seems to handle slightly better than it did previously (Very flat, very responsive, and still very predictable). I was a little concerned about how the car would handle on choppy pavement in hard turns, but that seems to be fine. Just remember, I'm not a professional racer, so take everything I say for what it is - An amateur opinion!
Looks and stance wise, I was very pleased. The front is lowered 1/2" and the back comes down 1 1/2", giving it a nice level stance, but not getting it so low you drag on every speed bump. That's not to say you won't drag on any though! Put a couple of your buddies in the car, and all bets are off. I have the QTP 302 cutouts on mine, and those have scraped the pavement a time or two, so approach those bumps with caution!
Overall, I'm very pleased, and would buy the FRP Boss springs again if doing it over.