not useless...I loved the factory 3.73s in my manual GT. Really fun to squirt around on them. I wouldn't put it on my new auto car though, because it already incinerates tires at will on the 3.15s...The 3.73 presented a problem at the track in keeping the car in fourth through the stripe so, I got a taller slick to accommodate that.
2014 Premium GT, SGM, Brembo, Auto, Tech, Comfort, etc. GT500s, Steeda UCA, VMP auto tune, 100 shot on BBR tune, best et: 11.38 at 120.85
2012 GT, Candy Red, Brembo, 3.73, Tech, Comfort, etc. Procal tune, Roush upper, UMI LCAs, Steeda red bracket, GT500s, 28X10X16 Hoosier slicks, best et: 11.91 at 115.23 RIP